Malicious PDF — malware analysis report

Static analysis result for SHA-256 558c6d46dbf67c11…

MALICIOUS

PDF

81.9 KB Created: 2021-04-05 12:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a3690ae4e4d76e2f5f0c8f131e514da7 SHA-1: ea0dba69bd61f971df55c8130d81e1fee014502b SHA-256: 558c6d46dbf67c1122be967ef3f494829267efdafe8e173e4022f68dc024475b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=cuanto+es+3+metros+en+milimetros PDF link annotation
    • https://cdn.sqhk.co/lubigegek/jcjhegd/40519703227.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/haArpjf/ice_sculpture_centerpieces_wedding.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/vifakalawabetijilati.pdfIn PDF document text
    • https://cdn.sqhk.co/jejefudebuxi/icYEih1/70898081689.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/fire_and_ice_melrose_arch_buffet_menu.pdfIn PDF document text
    • http://nubatevujonuw.mygamesonline.org/what_hand_makes_29_in_cribbage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_9be75c8f57b54906895eef034bb7714e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/tamil_best_love_feeling_songs.pdfIn PDF document text
    • http://rovunebezub.epizy.com/into_the_spider_verse_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/low_back_pain_home_exercises.pdfIn PDF document text
    • http://tikolikenugim.epizy.com/android_install_twrp_without_adb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/804e36e3-96a8-4da6-96ba-14c61f20ea5b/twitter_search_cheat_sheet.pdfIn PDF document text
    • https://7a69a04d-b0b3-478e-a927-895b34d3dd44.filesusr.com/ugd/159848_d18101ddb0ea4b5a8914ad26efa696e2.pdf?index=trueIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_afce7ffd5d1149d78b0e3343bda53c7e.pdf?index=trueIn PDF document text
    • https://3eeb541e-75be-486c-a732-b1e279b2a932.filesusr.com/ugd/eaab1c_709f160abaf341e6b05cba0517524cc2.pdf?index=trueIn PDF document text
    • http://tuwewigeniwaf.rf.gd/nadizezupevidit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1894c4-d52c-4851-ace1-02cb39f43094/stephen_hawking_books_list_wiki.pdfIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_b434ba1ffec14767b7aee3f7416b1e51.pdf?index=trueIn PDF document text
    • http://xovijoj.epizy.com/rivuposonulawuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bded0b34-2c9f-4418-8c5e-1211c02c16a9/balakisetareruzusuvumix.pdfIn PDF document text
    • http://nogomazarem.epizy.com/fetupututufipagabedevaja.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://scripts.sil.org/OFLIn 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_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 4900 bytes
SHA-256: d44c2812af0fa8f8990dad55069a3b9f6e43f7bb4e23586805320846ae65945f
font_01_sfnt_off0000fd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 11544 bytes
SHA-256: 4dee0fbfad96caa4982a36e81e50560c7b25031f5c8078479786c39b4c4920e4
font_02_sfnt_off0001238c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238C 16100 bytes
SHA-256: 738170ca93733cf3fe8d5d9af6e19279992d3ac9841a882bf61cbfa5b9da7e48

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