Malicious PDF — malware analysis report

Static analysis result for SHA-256 214193621602fc4b…

MALICIOUS

PDF

83.9 KB Created: 2021-03-15 23:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 40717f856dedd982c19d00eaae6cc787 SHA-1: 9b1b697a290a65fd3e5dad6eb01c40532e2c080b SHA-256: 214193621602fc4bc97f7f71db9ff311f78924c04811633cbcfb3d225f9aaa91
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-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=how+to+get+rid+of+flabby+arms+with+resistance+bands PDF link annotation
    • http://familyit.info/71373708301y417h.pdfIn PDF document text
    • http://hayatevesigar.online/bogitora_2013_songsxczq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_5fd7b78fd19ad.pdfIn PDF document text
    • http://xxlmature.site/how_to_program_vizio_remote_to_charter_cable_box62vm3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_604f652ab48e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5fccaad064e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_601b8a871e3af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_f0ed9b21060740efad9c93e6f85d4ff3.pdf?index=trueIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_f778fea9a19b48788274f9678bef8c96.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_c69f068c50864578b2dc83f320e8645b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/91250924984.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_5f631b3fe092495e81be7ef70aac1310.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/apa_format_biography_example.pdfIn PDF document text
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_323f57453fa84ab29769c05a75aa3141.pdf?index=trueIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_53166d69e7814dbcbee62495ab8f20a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/satudifin/endomorph_female_diet_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/rixudijinawovemijexiduxu.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/94598205143.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_f79ce01035f54032b197e38ea9d99884.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF994 5516 bytes
SHA-256: e562f1b4cc0f071c2456d7ede0e3c9cc326c85e8eaf4106ee132d88b8ea17bc8
font_01_sfnt_off00010c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 11056 bytes
SHA-256: ce30eb6e9de06f573297145b8b182db1ff8974e920c6389e9f27d9662bef6d1d
font_02_sfnt_off000131fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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