Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d732150b109e133…

MALICIOUS

PDF

75.2 KB Created: 2021-04-07 22:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2b7167df2ef51f618f0f0d27c0c010e9 SHA-1: 9149ca9502eef5565b721928f34522fc0613f5a1 SHA-256: 2d732150b109e13363f15f248e9633225b1e9bd6ee6a0f11ad953cb6358bd01c
186 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 0.9998

Heuristics 6

  • 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 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://jumiwimov.ru/123?utm_term=chinese+zodiac+movie+in+tamil+free PDF link annotation
    • https://nesojikav.weebly.com/uploads/1/3/1/3/131398336/3735117.pdfIn PDF document text
    • https://daxuwolazu.weebly.com/uploads/1/3/4/3/134335064/531c4d6704.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/jJjhiha/lejabisidovugumamoraritaz.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/zediwefutiziki_tivikiwimumi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408718/normal_5fcf2587aada4.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/gdgjVhe/46202968469.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5ffefb8b45980.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/f0jhHih/short_speech_on_my_birthday_celebration.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5fdac92ce0bda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_6022aa165b3be.pdfIn PDF document text
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/3a3d73a22a29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_605c6fea353d4.pdfIn PDF document text
    • https://gejidodedawo.weebly.com/uploads/1/3/4/0/134018108/nopudizotab_nukiki_kajuzasopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_602c13d92e1b8.pdfIn PDF document text
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/f99d1026c.pdfIn PDF document text
    • https://dagagiketilijo.weebly.com/uploads/1/3/4/3/134312633/gupedid_lanafezupid.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/QAhjggf/basketball_showdown_royale.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/7570e7c1-c28f-4010-b567-73fbab8fca8b/walmart_black_friday_2020_tv_deals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9b5b8c-cd81-4d6c-bd8f-e05a3c4df02c/mit_solid_state_physics_lecture_notes.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_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 5276 bytes
SHA-256: efc3b5990a6c946dea7f8d994c25398bec7d832ce59dc6b61ce7eba21e875590
font_01_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 10332 bytes
SHA-256: 78008e799c1deeb09ddfabf1ab8142cdf1d2686a4d5e45164f819161e8ef8135

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