Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86adb2bb5fef585…

MALICIOUS

PDF

82.4 KB Created: 2021-05-24 18:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2f28d3489ce3ffc889b82e2142258331 SHA-1: b6d99788b5e613d0344be16d3fbc8aba1d102828 SHA-256: e86adb2bb5fef58572e9fb5e93a23ca9655828ef4d72d8d730720f5283bbc034
156 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 0.9993

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 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.
  • 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/strik?utm_term=truecaller+id+premium+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469836/normal_605e18455cc5b.pdfIn PDF document text
    • https://zupelewelasilag.weebly.com/uploads/1/3/4/5/134594614/sefoj_tigojimofikiw_ligirupalevegev.pdfIn PDF document text
    • https://mirivibi.weebly.com/uploads/1/3/4/2/134234555/3087673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_604ce3c101c12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_6060f08313f79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486035/normal_600c60b2831bf.pdfIn PDF document text
    • https://domemasajexal.weebly.com/uploads/1/3/5/3/135304114/1080329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414339/normal_6002c53946a13.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/eeeee782-209b-4a1c-b983-ced9ff9e7847/skullcandy_soundmine_bluetooth_speaker_wont_connect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3424c7-5077-4e42-b2d2-0af23a17c056/63545414995.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/40837430698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003be651-9e43-4d9b-82fb-09399651a3b3/fupotur.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/dota_2_complete_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7bd313d-5c1f-44ce-a062-45786ebc214d/fuduf.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/27943970593.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/foxit_reader_printer_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/sidinebunimutajosuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b28f6e0-2a69-469f-b473-46de39893bc7/are_one_touch_lancets_interchangeable.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/zaxivilovosudozevibat.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/auggie_me_three_wonder_stories.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/38181441309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bbf19d-50e6-4c17-9e01-fe0fd8d4b7ac/first_edition_harry_potter_book_with_typo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481306bc-7160-43d0-9db1-581dde0b9cb0/45672415643.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/6210474809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8059a77-56c5-423f-af8d-17bc5307164d/how_do_i_apply_for_a_us_postal_job.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_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 5056 bytes
SHA-256: 05917349ee0baef3d13ce2e56c3fc0a969a36959d0cd46c19092c2800dbecff6
font_01_sfnt_off00010aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA0 21500 bytes
SHA-256: d20487caf2420e0ea801ac5a056e7d759eaeb860dd4756b1814f06341cfb2289

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