Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1030da99ae82506…

MALICIOUS

PDF

80.9 KB Created: 2021-06-12 01:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8b4a9c442bfbf0e7b520fb8d7ff74df9 SHA-1: c566caa8a2815088acbd6bb573d3796763d26386 SHA-256: e1030da99ae8250618d52aae8391ae580c6db0567cabce206f8e73e53d00addc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crysiq.ru/pbw?utm_term=inventory+management+database+design PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376870/normal_5fff23d684117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411931/normal_5fe4598534cce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_606e2d8352d71.pdfIn PDF document text
    • https://xetibipu.weebly.com/uploads/1/3/4/5/134528590/6484485.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/8796628fc823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_60359e896ffbd.pdfIn PDF document text
    • https://nirotagikul.weebly.com/uploads/1/3/5/9/135992947/8352813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423155/normal_5ffe170bf2556.pdfIn PDF document text
    • https://xeluluferira.weebly.com/uploads/1/3/4/2/134266649/15639.pdfIn PDF document text
    • https://fazafunapogaz.weebly.com/uploads/1/3/4/1/134131986/4a284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417321/normal_5fd1ea48d7ad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_6010e7f57164b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nefusim.pbworks.com/f/my_talking_tom_apk_mod_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96dbd311-946a-4a48-8d97-96e222426ac8/barobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe530fe-150d-4a07-8e7a-54bedfbdb671/23364763387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd7e039-d377-4ee8-ac6f-c3cf1e7e0441/rakumimelofiti.pdfIn PDF document text
    • http://wojipag.pbworks.com/w/file/fetch/144745401/53060957458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a996b326-01ad-4c94-94ec-1181832ace08/roland_xp-80_keyboard_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0c75ad-2e23-479b-b844-3bc652b7066e/26314585850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb9ec987-74d9-4a1f-a1a3-559c93416538/37468664154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaffdc23-1c42-48f9-91d9-aea631882231/mituboxubuwaxuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b87959-6507-4581-8c11-cb93757ac615/ionic_and_covalent_bonding_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0c70a1-1274-4a39-98c0-46335acb1333/power_acoustik_ptid-8920b_manual_en_espaol.pdfIn PDF document text
    • http://zanopadik.pbworks.com/f/24877282019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89574d9-928b-4581-a8de-55071da7ac13/how_do_i_become_a_christian_life_coach.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_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 5352 bytes
SHA-256: cc779e6f742a5eb186b3cf3f0ae3f0c74bcd504138356db9e8f51b55d83cb4a1
font_01_sfnt_off00011113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11113 10852 bytes
SHA-256: 562c6d416eff0f417788aa9e10ad5dfbc4243565c95eddb70a358224350914e3

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