Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa1aa3c8ee4623c…

MALICIOUS

PDF

81.4 KB Created: 2021-03-20 23:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0008142727c99849a9c4893a792c1133 SHA-1: ec012cc0ecca36409187c58a44889fce7d63e076 SHA-256: 0aa1aa3c8ee4623c65e7c272ca951339e9275cf92a2a6ea75848096cd8d62d48
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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://mezovuduw.ru/strik?utm_term=the+silver+chair+movie+2020 PDF link annotation
    • http://handler-autoscout24.com/zegewewuzomarxsgol.pdfIn PDF document text
    • http://junelizirigoroj.iblogger.org/birthday_wishes_for_free.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/biluvexuf_jenav_zokawumilanune_puwog.pdfIn PDF document text
    • https://farenutatovepo.weebly.com/uploads/1/3/4/5/134502273/ebaad.pdfIn PDF document text
    • http://gazorowegesejix.22web.org/declutter_your_mind.pdfIn PDF document text
    • http://titanovyi-filtr.ru/wavelength_formula_unitshm07z.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/a54840a7bce37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralivapoked.epizy.com/hatchet_book_leather_cover.pdfIn PDF document text
    • http://xunevonobi.epizy.com/trust_of_land_and_appointment_of_trustees_act_1996.pdfIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_9e6bc37944b64e4a9cfb96465af52dc4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d376505e-9f32-4288-8b3e-64eb56d0f85d/linear_garage_door_opener_ld050.pdfIn PDF document text
    • http://jegozejixal.epizy.com/xelajisomejewuxo.pdfIn PDF document text
    • http://pudawetik.rf.gd/surrealista_definicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/578fbbbd-6a1b-44ad-af86-c44a8d68db5e/gledai_indiski_filmi_online_bg_audio.pdfIn PDF document text
    • http://satosawinesuf.rf.gd/51235946972.pdfIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_cd5133da6e0e4ced85059cfb87e4dff5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0248e86b-c12a-412b-9957-516acc3b650b/28972884663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ac64b0-80b2-4cf4-aa21-55fabbae1434/howard_leight_impact_sport_bolt_earmuff.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_off0000ff8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8E 5324 bytes
SHA-256: 93a40bfada75687acfdce52c95dc304d9364ed1a7e8afba95197123033a7580a
font_01_sfnt_off00011181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11181 11436 bytes
SHA-256: 640157cbaf6619c982388e3d9c4bf284fe9c9580fa4e44cb7910fc72cecf13ab

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