Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d9010bb1ab84f8…

MALICIOUS

PDF

79.9 KB Created: 2021-03-26 12:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eb738524709a763ec5a55e750f477ad0 SHA-1: 255ba7810cf16aa2ba26a71080c7a3b59a91e64f SHA-256: e5d9010bb1ab84f82eee877cc48bbab30855d2752d3ba02224d6c7ee812aa0a6
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to drive traffic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://gimoguvi.ru/123?utm_term=characteristics+of+living+organisms+answer+key PDF link annotation
    • https://fasanisig.weebly.com/uploads/1/3/0/7/130739318/6630991.pdfIn PDF document text
    • https://nusaniwufozeg.weebly.com/uploads/1/3/4/7/134751508/6223582.pdfIn PDF document text
    • https://darurirajilubi.weebly.com/uploads/1/3/4/3/134318819/vozokoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_601125e1ca798.pdfIn PDF document text
    • https://remavugotidub.weebly.com/uploads/1/3/5/9/135962193/40186eb9.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/3blkJhf/maxurim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484356/normal_5ff427001c9a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471691/normal_5fe8a592a8702.pdfIn PDF document text
    • https://powizosiki.weebly.com/uploads/1/3/4/0/134041047/8068949.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/xemoxeludefano.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/fEjbXgg/zeperuxumobifile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451955/normal_604421eb42fe3.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/jjhiE3J/kejusupagukepetojesiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_603309a10bde3.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/ghhcghx/street_fighting_2_multiplayer_mod_apk.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://uploads.strikinglycdn.com/files/f2311c46-4108-46e1-adc5-1bc82cccd531/oxford_history_of_the_united_states.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcaa4e56-541b-4d25-a116-ffd07dca9964/icamera_1000_adt.pdfIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_76a575779c724064937ee3322aa8d826.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a522e261-cfc9-4809-a59f-5a823dcf6c7e/prince_lionheart_wipes_warmer_without_pillow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2507356e-f7f5-4002-b0ac-77627d22674a/casio_watch_alarm_chronograph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b098f665-e504-4466-beae-85710944e757/metals_handbook_volume_2.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_134e1693e9354617820522526bdece80.pdf?index=trueIn 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_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 5424 bytes
SHA-256: 18de3a106dbbd37add80f1334a9158824f4aa22c312d0dff92f34b2c8e3c2d49
font_01_sfnt_off0000ff45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF45 11068 bytes
SHA-256: 35edb84d25d9928860210bd1dd3ed639758758fda677f054d3712f698c755e4e
font_02_sfnt_off000123d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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