Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3aa9b2a243f936b…

MALICIOUS

PDF

70.5 KB Created: 2021-03-16 09:03:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5f7d90d8a663d368b28691b11d6aabbc SHA-1: 9e2c58b0405aa2d17aa04621c39528184a304d20 SHA-256: e3aa9b2a243f936bb39550a20476ad672409e0e928eb95ad5c7d23820d42778e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary one pointing to 'mezovuduw.ru', suggesting an attempt to redirect users to a malicious site. The PDF structure and embedded links indicate a link farm tactic, likely to distribute further malicious content or lead to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=alter+ego+4+plus+b2+pdf PDF link annotation
    • https://dapifakefigev.weebly.com/uploads/1/3/1/6/131636612/4f2c164c283bfa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458144/normal_60005c2755701.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/ia6jdiB/99593448144.pdfIn PDF document text
    • https://rajezedej.weebly.com/uploads/1/3/2/6/132682549/pajefagefekazoxunu.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/t3hazy8/stick_cricket_super_league_mod_apk_everything_unlocked.pdfIn PDF document text
    • https://cdn.sqhk.co/xozirijor/yBjedik/manjunatha_songs_free_kannada.pdfIn PDF document text
    • https://cdn.sqhk.co/jutalufelex/gjj3uhh/19658882313.pdfIn PDF document text
    • https://lujukote.weebly.com/uploads/1/3/2/7/132712447/2331449.pdfIn PDF document text
    • https://cdn.sqhk.co/wejawujagi/geOvZjc/ben_10_alien_experience_game_download.pdfIn PDF document text
    • http://fivogudog.iblogger.org/dover_beach_discussion_questions_and_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369633/normal_5fdd28d851cf2.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/3338672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462374/normal_5fe33dfd602dd.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/nasujajipinif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_6022e9b31a218.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/572946e0-236b-4ee0-a6a8-9c986cc3e7c3/zesolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8df99be-f950-413a-a615-87bbeeb47f36/32721814915.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/gozox.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/73599288551.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/fumabilimugukolokumalojag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03da3914-ee1d-4475-a2d7-6fc5bb443a34/what_is_salary_of_software_tester.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef3a3e6-e65e-4fc6-bb90-e8d19d128746/fibakokizulaxetoguvod.pdfIn PDF document text
    • http://jafiporada.epizy.com/lalinus.pdfIn PDF document text
    • http://lerapavuzuloz.epizy.com/xigebub.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD465 5348 bytes
SHA-256: 76dd2662f9f488be2f40f3f1705acd7d456ac1517d08a0b1da5aa2bc5fb2bebd
font_01_sfnt_off0000e6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B3 11144 bytes
SHA-256: d8d1d1d9e717e3bcf6971b0996fac08cfe9e9ec5d92cfb67940beb1f610efd53

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