Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bad38d7ddc280dc…

MALICIOUS

PDF

86.0 KB Created: 2021-03-18 04:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cc9a13313431813f61260cdefec5cc86 SHA-1: ebf2f8bbf2a07d6fa36cb9d699b330cc247bec93 SHA-256: 4bad38d7ddc280dc2d544e33f4f7ae42bcf10211e4ab3de9ef0d4154f459a039
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URL and the nature of the links suggest an attempt to redirect users to malicious sites.

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://baarspo.ru/wix?keyword=2005+chevy+astro+dimensions PDF link annotation
    • https://viwitilabepimep.weebly.com/uploads/1/3/2/6/132695477/zunusedexatabonozub.pdfIn PDF document text
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/padujo-bimupit-tidinowi-watagew.pdfIn PDF document text
    • https://rusipamisu.weebly.com/uploads/1/3/4/0/134017355/merekof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_6044d3e0a9d74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454820/normal_6035c34a936f9.pdfIn PDF document text
    • https://pigaxapi.weebly.com/uploads/1/3/2/8/132815084/wowedegebob.pdfIn PDF document text
    • https://vapukukoson.weebly.com/uploads/1/3/0/7/130776878/9383534.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494149/normal_5ffd01325f7d8.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/f52b61b2-ae42-41b1-83da-a6384210efaa/roxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adff7b45-779e-47d2-93c0-7f7896152b6f/persepolis_french_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a4de6a-40f2-402d-a0cd-835dcf3a4ce1/pofer.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/transformers_barricade_mustang_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edc3792-8a94-44ff-b17d-b117d12db0dc/72469174104.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/online_photo_editor_pixlr.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/45166207634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ebdff4-934f-486c-90fe-f17ff5e80903/6886553869.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/kokumaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1018c1e-1317-4656-bc69-366cf247524f/canon_powershot_sx100_is_digital_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee133d8f-3438-4236-be0d-8c1e0d08ae26/are_malm_beds_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d6c5d07-8104-475c-9634-f18629a6609e/23328558512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22eed6ff-4de2-434e-a62f-00835d34d0c3/harry_potter_wands_universal_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/fake_military_id_card_maker_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d840a69-b687-45ea-ac70-70fc514a24a0/cisco_ccna_200-301_exam_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c3bc8d-a405-46a9-abf1-effe26df78ed/pemomakonipukogiwodirukuz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 5612 bytes
SHA-256: e4e63a21034fd279a0909ae0dfe4ed22920cb2afe332107e8cb7ed13ef08e2b4
font_01_sfnt_off00010c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 11596 bytes
SHA-256: 0c06ac97d1db09c151d191cae6aeaaf2986ee4a10c6a9e06dbc68727c90be965
font_02_sfnt_off00013469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13469 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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