Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c63e5f8fd637783…

MALICIOUS

PDF

74.1 KB Created: 2021-04-29 22:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 39271fb9d00126cbfbba428d58e76200 SHA-1: 941fc42b4bace402d9f346bc861249c6ece0041f SHA-256: 8c63e5f8fd63778396561b219476b2ff6064324e38af696fdb26da5f0f5cd4e1
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 0.9991

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 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://lozipotod.ru/strik?utm_term=whirlpool+washer+error+codes+f5+e2 PDF link annotation
    • http://zutolewe.mywebcommunity.org/11712944843.pdfIn PDF document text
    • http://molefomisapeput.mypressonline.com/agile_software_construction.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/60429134288.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/can_cricut_expression_2_cut_vinyl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_602d975648a98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468286/normal_5fdca9a002620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_6020c7bd7d9e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_606b7737e4844.pdfIn PDF document text
    • https://mixifomako.weebly.com/uploads/1/3/1/1/131164472/d5e93a3d17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_5fc74b5b0ed7c.pdfIn PDF document text
    • https://xozejobe.weebly.com/uploads/1/3/1/4/131406614/jadop_tumemo_wotavowup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5ff7810624bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_606e62c510308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451561/normal_5ff667c83df06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_60491c1ea9ab4.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/lokijuronig/miwemukiwizo.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/cannery_row_full_book.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/guild_wars_2_elementalist_training_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/18477511380.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/10285882040.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/23868688954.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/carl_sagan_pale_blue_dot_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/changing_the_constitution_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/jiwawonom.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/gedavesileforedemubepipa.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE289 5604 bytes
SHA-256: 5db1edfb30c19be706d5a8d9eb53c6b2d0c83142619d611c54a94ba2d0731762
font_01_sfnt_off0000f5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AC 10760 bytes
SHA-256: 452c929537c905ac456c81ac5bb58316ede208b88a65b98e072995f9eb1d0d95

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