Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba9c149b52c7fa1…

MALICIOUS

PDF

74.4 KB Created: 2021-09-19 10:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 53f94d15310d9895fb65c889b723a3e4 SHA-1: 94a14cc63508739f670b12e1f314988fe06a4cfb SHA-256: aba9c149b52c7fa19b3314eaebdbf8a8e993948263e731d3f2f98faa13cd00e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, including one pointing to a raw IP address, suggests it is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the document is part of a link farm, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=naruto+offline+games+apk+free+download PDF link annotation
    • https://odontologosmalca.com/images/userfiles/file/fabajobutinesibunon.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131e21d2ed41---29152385724.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/jomenapujulizof.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1613067d10c5f3---84080856831.pdfPDF link annotation
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612efc81c60d1---bimixugul.pdfIn PDF document text
    • http://amsuatrust.org/survey/userfiles/files/xodevudilejuxepekoluludof.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/mifowime.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/tupovigilitosagatuxitawim.pdfIn PDF document text
    • https://toocapen.com/files/48199017477.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/vefaxodamidujugudetuxajan.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/sonavi.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/75059869339.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/jamutumevipukuxasoxuk.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/gozijusuwamozegefazuxifu.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/fewogibipavegej.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///67526969910.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/ruguz.pdfIn PDF document text
    • http://mamnonhieutrung.edu.vn/ckfinder/userfiles/files/92983981686.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/31021473260.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/zosirefagu.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/dajibodukimal.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/28949297781.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/kewakejalewera.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/73214994050.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC002 11096 bytes
SHA-256: 9e4882b1121d2ffeef4f767b9f4c892cf80903c6b83f3733ff4013e733a3436d
font_01_sfnt_off0000d9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B2 16448 bytes
SHA-256: 7101675a3ffc0735662d8bf5ba42d2e3cae912df7d0c9ca6e73b4b7abdcc8537
font_02_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1