Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea83890276b3eb7…

MALICIOUS

PDF

80.0 KB Created: 2021-05-21 09:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 93ba8d64a4ef3b2a7e1e84afb90100e6 SHA-1: 237a905f8738e7489c68198c7c297d5440e984ba SHA-256: aea83890276b3eb707cdc156e55766789e2542f90c680480b63590adcbbf1358
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common tactic of using documents as bait to drive traffic to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=how+to+download+mods+for+minecraft+xbox+one+edition PDF link annotation
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/1699129.pdfIn PDF document text
    • https://zatenumidepav.weebly.com/uploads/1/3/0/7/130776458/tunuxu_xoworop_vapafomujag.pdfIn PDF document text
    • https://xunijududivajol.weebly.com/uploads/1/3/0/9/130969830/pazedaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_606e148d63d54.pdfIn PDF document text
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/5c2f68517ad.pdfIn PDF document text
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/lasiwejukoteze.pdfIn PDF document text
    • https://nuzibekupin.weebly.com/uploads/1/3/4/3/134338080/5552446.pdfIn PDF document text
    • https://sanositew.weebly.com/uploads/1/3/1/8/131872303/dawipalekala.pdfIn PDF document text
    • https://jejusutib.weebly.com/uploads/1/3/0/7/130740078/5787444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496193/normal_6027c3b4a47d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_604e28758239f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444123/normal_5fce601c2d754.pdfIn PDF document text
    • https://ridakikasidom.weebly.com/uploads/1/3/0/7/130739592/ddaa37.pdfIn PDF document text
    • https://kesoxebexug.weebly.com/uploads/1/3/2/6/132681937/tekawujove_livesagasamupe_jomoxibol_fasoxifima.pdfIn PDF document text
    • https://munerojepoges.weebly.com/uploads/1/3/4/0/134042508/nodin.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/ravirutijowal-riweberipixepe-kuzalitetalen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_603d3c937b3f3.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/1f421a3e-4869-40f1-aa26-3b8a69bcef9c/jidazetakanagebovikip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855a4abd-f329-4623-b8b6-d5b99c8136e1/sat_subject_test_scores_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/205a1f22-5766-456a-b504-7590de86c788/78286091704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1951925-7ed4-4c89-bcfa-af218f43b109/lava_hd_8008_antenna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4058002b-ce07-4295-8896-c5dde022a8fb/how_to_solve_a_3_by_3_rubiks_cube_easy_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9191faa7-33ec-45f9-9332-98e52d7bef12/polaris_trail_boss_250_4x4_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2609c0-47ad-4fcb-b1f1-b78a0fea7262/what_does_blue_color_personality_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0082dd27-02b9-4ad8-a0d0-463a6de1bbed/nidozamedonomilopimisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f0c4cd-51e1-48ab-9d4b-612b1b87f272/craftsman_garage_door_opener_learn_button_colors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fec2da-9f14-4a93-9ca7-1a90a29496a3/new_practical_chinese_reader_2nd_edition_textbook_answers.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_off0000f65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65A 5428 bytes
SHA-256: daa93c178ac4bd8b32298ad1286b098782d26c134e91484309a7da22b80874be
font_01_sfnt_off000108c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C8 12372 bytes
SHA-256: d9956e4b800bf359fa01c3a72e3f0781b43dc46a60604f15fee233ae893365fa

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