Malicious PDF — malware analysis report

Static analysis result for SHA-256 1049448c33f9c28f…

MALICIOUS

PDF

96.9 KB Created: 2021-07-06 14:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 10b87a06a0a232ae082f39ed540ad2db SHA-1: 9836718a3b986c3b86ff2742b837e642f58d4ede SHA-256: 1049448c33f9c28fc7b36578cd6deb661713485f19d73e38789d08943f3f46c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as phishing or a trojan. Heuristics indicate the document functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links likely serve as a lure to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071702bd6e1b---peravobuwawa.pdf In PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1e827c680---14707570688.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/munivajagogu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5712910f0d.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/gvn503r7m1lhrdb9tij298o4jk/52013095430.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/51751489373.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210706_CF6F786D3DCB61B7.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/bivafipukavovutetogame.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/52717718330.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/38362851191.pdfIn PDF document text
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/gizofosumiziwo.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/jii4mogd8pvcuviahb0asm9al6/pafanupizepevubabik.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/rivisupufekigifaramufanal.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/4339347695.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/48fd40445c986f6754415d7ed37ed49c/lesujesegivosew.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/boc37phifbsse7fpoci33r37d5/88463121901.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/1ajjehndn450q220iadpsm8qe5/81773326430.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bdadfe01337---18215654485.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bedfbbee608---meminawoxururepi.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ieje2vfeuplr049hs541q1udi0/genunejugafemal.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/1fdc959386bcc2bad08df64acf6b240c/17171226317.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/bupibuwezagagenolarugam.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebbb6942b1---48398943718.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1e35abc74---10222139262.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/zozajotomufusedituvi.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210504020140_1943944190.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/k9ae73vm1387srvqv9maps6d13/58972865928.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=cereal+countable+or+uncountablePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F7 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_02_sfnt_off00012bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD3 19332 bytes
SHA-256: c323a8c397e8d7652ad5047b19f11e5ac833ff97f23f4dd0631e4b7976a6fe69
font_03_sfnt_off00015ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA5 10232 bytes
SHA-256: 61b8793e5a6d696889c6fdaa59022669db2c9e6314bac042956749240814551e

Open this report in the interactive analyzer, or submit your own file for analysis.