Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2c5b336c910752…

MALICIOUS

PDF

79.1 KB Created: 2021-04-04 14:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0dd7b2cd2d8cf9ca3b37aa9b10760956 SHA-1: 21f1c9ace4e94d91682d512f9f631a8018f79f8b SHA-256: 1d2c5b336c910752e9a68b38a349ce5465510ab2848264192f9671e6945c4f10
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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://crophysi.ru/strik?utm_term=anna+seghers+transit+figurenanalyse PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374839/normal_5fcf4f0519f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_60220978a99a1.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/ihc4FBv/forgotten_tales_mmorpg.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/asphalt_surface_treatment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403531/normal_6004dea82aff5.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/bvpjegh/gubazamobotupuxanededuwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412158/normal_5ff53955a4987.pdfIn PDF document text
    • http://paselon.getenjoyment.net/7th_grade_common_core_math_practice_test_answer_key.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/wogadebolanitawufe.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/gED4lnr/paint_color_by_number_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/jSichgh/chicago_police_officer_shot_2019.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/nepagobuzawumiborimam.pdfIn PDF document text
    • https://cdn.sqhk.co/gediwuwanol/igGvgcf/xumazorasaxajota.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/VdvFSgi/sedijijawejoverezilu.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/1349c908-e857-46c3-a0e0-648d51a200b5/how_to_make_homemade_swiffer_wet_jet_pads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a919d71b-56eb-4349-8766-e6bf727a74e1/why_is_my_ac_light_blinking_3_times.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/jofozozutabotenimanem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad78f76-6b49-458c-9839-6f062d429fab/4976232922.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/automorphic_forms_and_representations_bump.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DC 5120 bytes
SHA-256: 94f57db036e015ccfe681208c6dfbcd5397a9f3df5f09233e1a3021a5b3f6598
font_01_sfnt_off0001094c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 11628 bytes
SHA-256: e4b0953facccc803be83d5d79d3738cd086baea6c75e68e9e1ed5a76095691ca

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