Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea221dc89d40857…

MALICIOUS

PDF

79.7 KB Created: 2021-03-02 13:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d642e7d0fec6c2ef1b5917eef948af2f SHA-1: 5f2b0c299a7a4f79489d44ceae036c95ad2b1536 SHA-256: 9ea221dc89d40857c8fd39a362830b75c2406ba2b4bace8d957511c40862b051
126 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be a lure related to search queries, further supporting a phishing or scam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wb?keyword=are%20mini%2014%20legal%20in%20california%202020 PDF link annotation
    • http://tafugegajotu.mygamesonline.org/mitsubishi_mr_slim_inverter.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/bissell_proheat_2x_healthy_home_pet.pdfIn PDF document text
    • http://samyog.ru/horse_mannequin_challengehs7c8.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/woxotumomujajinegoladu.pdfIn PDF document text
    • http://retys.fun/segevilomubuxec37e9.pdfIn PDF document text
    • http://gradstroy.su/gelimuzonowigiwujs86xo.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/87807532285.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/84530434586.pdfIn PDF document text
    • http://stassikorskyi.com/can_i_download_apps_on_my_panasonic_viera_smart_tv2zmzm.pdfIn PDF document text
    • http://navaram.online/260527035901sm94.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/how_to_check_drivers_license_points.pdfIn PDF document text
    • http://oyuncuxx.com/assassin_s_creed_1_gameplay_pc5a3tk.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/sofejukod.pdfIn PDF document text
    • http://itawomen.fun/85809275786z2ndw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gonasidupij/22149417646.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/17056906873.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/abbyy_finereader_for_scansnap_tm_4._1.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/one_punch_man_exercise_before_and_after.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/lizokutux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 5136 bytes
SHA-256: df5cea55d034c8ef5ec574c093afd8e36d6d19ed7042df8db1fe0e929dfa17e7
font_01_sfnt_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 11396 bytes
SHA-256: 5784b8287e69c51f58ccae269015974bbcb0d5fc6f9d10baabf9ef35d80ad1b4
font_02_sfnt_off000122c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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