Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff881f3696f5d2c…

MALICIOUS

PDF

74.2 KB Created: 2021-03-04 19:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6d3995cb5a245c734e61deccd80555b8 SHA-1: 35442f556c545b8b90782f82cd3fbf23ca0c6903 SHA-256: 2ff881f3696f5d2c071ca2309d30466fa74a39b30b64513f52b4b84c096a3ce9
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 0.9996

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 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://jumiwimov.ru/award?keyword=uv-5r+chirp+radio+did+not+respond PDF link annotation
    • http://betijeduw.getenjoyment.net/dewalt_drill_bits_at_lowes.pdfIn PDF document text
    • http://helen-art.ru/bikufubea9g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404497/normal_5feea990204e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_603273c89d63f.pdfIn PDF document text
    • http://lugabev.mygamesonline.org/english_speaking_practice_software_free_download_for_windows_7.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/tascam_recorder_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471475/normal_5ff9f2b0b3bb5.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/social_psychology_11th_edition.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/coachmen_beyond_22c_cost.pdfIn PDF document text
    • http://axecheat7.xyz/sotut6q0rn.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/what_is_the_plot_of_midnight_sun.pdfIn PDF document text
    • http://mxbur.fun/45164956636lqb32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_6035ba207095c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/whatsapp_for_nokia_x2_java.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_82ecc13eb00042aeb7724a0e740da6c1.pdf?index=trueIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_cf7d2ec7b397458eb81cdcbdf76c8e92.pdf?index=trueIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_427d577019034b538718e49557c44def.pdf?index=trueIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_771dedad28b64f07bf65e735f2feee7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nokiva/best_android_phone_under_20000_may_2018.pdfIn PDF document text
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_a3d61e620d8b48afbe52e4198f4ef4fd.pdf?index=trueIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/88771299921.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_off0000e562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE562 5336 bytes
SHA-256: c92874b708a4ef4368f0b7bbb698f14667cc2c95f42588206b8409c88d8d2dda
font_01_sfnt_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 10400 bytes
SHA-256: 85d29c12ff7f12dd895094be240be0efb5c25e6509a001b2cf6335080091b0d0

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