Malicious PDF — malware analysis report

Static analysis result for SHA-256 3308f09196f1f2df…

MALICIOUS

PDF

75.9 KB Created: 2021-05-20 04:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 53ff10b9239cf33025273a0d2f6ab307 SHA-1: 22acdd64bbd593046767eda057ce4d0f96c78100 SHA-256: 3308f09196f1f2dfac473258132302a80536ba333996902c339c1464c2593534
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 0.9998

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 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://pelibifir.ru/strik?utm_term=comcast+xr2+remote+will+not+change+channels PDF link annotation
    • https://xojolulodi.weebly.com/uploads/1/3/0/9/130969725/wenoluvamevogotaxa.pdfIn PDF document text
    • https://fetavagipiw.weebly.com/uploads/1/3/1/3/131380759/pigopim.pdfIn PDF document text
    • https://duziduwavi.weebly.com/uploads/1/3/1/0/131070207/rapakadezoxi.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/zesotat/how_to_use_zoom_h6_as_computer_microphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412e0bbb-3beb-425e-89ac-ad55b0b52759/86525803526.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/good_morning_photos_hd_free_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe44380a-5ab6-4c85-b0bd-b28052a3e76b/android_app_development_cost_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b4ca02-58de-4ae3-bfc7-afb5fe0649eb/ferrari_california_t_horsepower.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/what_is_translating_grandfathers_house_about.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd22d739-d19a-4334-959d-3e88c2438981/rexikarujig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854e19c1-787c-4cf3-a9dd-5b219288d981/horton_hears_a_who_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/the_gift_lewis_hyde_chapter_1_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/kowanobuwefob.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/death_of_a_salesman_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/blizzard_really_slow.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/neato_robotics_xv-21_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47022b1-73e9-4560-b08e-bd713e1fda25/kafekevurepisuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da305497-073c-483a-9d27-a0efb09e4d6a/43091040642.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_off0000ea26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA26 5412 bytes
SHA-256: aacad4e0b1fce6626b93163fa6d97abb9d89900f8f6cf7ab08f1612d8ca1916b
font_01_sfnt_off0000fc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC72 11148 bytes
SHA-256: 9b658537306a071ef901f01d8526fb4e31b01d0cca3e0d6e03f4ae5a84beba74

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