Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bb1ea61d945457…

MALICIOUS

PDF

68.4 KB Created: 2021-05-21 20:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 797398a429b98eee1dabb87304b32ecc SHA-1: 94931ef1ef61a9b9d6fb57ba848e0627859acd0f SHA-256: 75bb1ea61d945457d459750507f19605082cad6e18432890bc62056730e4d692
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 0.9997

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 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://druttle.ru/strik?utm_term=vocabulary+from+classical+roots+book+c+lesson+13+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477921/normal_5fef3b4dc2a5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448337/normal_5fe4fee643e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_5fe810645546c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_606b0bf1b1a5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475217/normal_6068f15ae4f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468820/normal_60658d3507ee0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_604d882f51a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474980/normal_602eaa97d459f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450732/normal_60376b2231e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_6015a584681fc.pdfIn PDF document text
    • https://bipusisep.weebly.com/uploads/1/3/0/7/130775903/2552382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_604cb32c0c58a.pdfIn PDF document text
    • https://xigizimevavas.weebly.com/uploads/1/3/5/9/135982966/4106994.pdfIn PDF document text
    • https://posesisex.weebly.com/uploads/1/3/5/3/135332701/6250b79167f60.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/eef04fbb-f5b3-4c0f-a558-df4df822f58a/john_deere_mower_deck_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31f6ffa-63e2-4044-8dd3-41b8af27915a/maropujawepemuvigoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11277f36-c0b4-4f30-9fdc-aa713ed77359/how_to_set_my_capello_alarm_clock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2a48dd-49b1-4d38-8cb1-baff098cf60b/gimasorilufokenem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58fa30c-2e6b-4c3e-94b8-9a307aec552f/how_to_use_playstation_remote_play_on_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e967853-0f8d-45cc-9f5a-bf293daa987b/juego_hombre_araa_online_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3879b1-6f3f-4ec5-ab90-536cdeadc62f/rules_for_adding_and_subtracting_positive_and_negative_numbers_worksheet.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_off0000cf36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF36 5604 bytes
SHA-256: 01677571aa10862105745bb68ff5f976973ec0522aa45791ffbab70eacd93f0c
font_01_sfnt_off0000e251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE251 9912 bytes
SHA-256: 8833ef61679634319074bf53084dcb230a043fcbdbdfaae8b4aebaf6f060a7dc

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