Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b26ce7b68c6b0b9…

MALICIOUS

PDF

70.7 KB Created: 2021-06-02 12:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9fb3ccc2d7c4a723aee3fda578b26e1b SHA-1: b94104e0896367a9c9b5c457757bc20a14aae857 SHA-256: 5b26ce7b68c6b0b9c92dcde47c381e87720719bea302f506bdc11144b551583c
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 0.8874

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://pistant.ru/pbw?utm_term=section+1+reinforcement+forces+inside+earth+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fca9de55f944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fe39cddeb37e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498983/normal_60684174590ee.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4386824/normal_60b4f6dd7d7e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390659/normal_5fc84a7b81dd8.pdfIn PDF document text
    • https://xodinelexobi.weebly.com/uploads/1/3/1/4/131438891/jaruwulenomezolimuno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466408/normal_5fe30f3829c4c.pdfIn PDF document text
    • https://kavuwaxexo.weebly.com/uploads/1/3/5/3/135351152/419510d46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_600db235f091f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381081/normal_5fcf240718f70.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4369919/normal_60b623f1b6776.pdfIn PDF document text
    • https://vadidavulegisiw.weebly.com/uploads/1/3/4/7/134760242/4702952.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475992/normal_6001814558324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487424/normal_606e46092e6d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501204/normal_6014a3c36e886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5fe98a0ae0ab5.pdfIn PDF document text
    • https://lafibovuvi.weebly.com/uploads/1/3/4/6/134653173/repijaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481852/normal_5fcd989003452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_6041e067b9a75.pdfIn PDF document text
    • https://pesadoxemanuz.weebly.com/uploads/1/3/4/8/134852899/3de99f8fdd837.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://polubisoxuwo.pbworks.com/w/file/fetch/144498204/butonusezi.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/f/bininexafiru.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/f/american_heart_association_acls_pretest_answers_2015.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/makixumaxalur.pdfIn PDF document text
    • http://fotikeralo.pbworks.com/f/get_followers_app_iphone.pdfIn 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_off0000e436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE436 5540 bytes
SHA-256: 493edba2f2963a9ca3975a6f4763b9a4c7d02a69f12e94f91110c1c6bc9ccc28
font_01_sfnt_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 10396 bytes
SHA-256: 4359050f9d783251c1d71f5b20a7eafc5e14460c270a47b4db6b9be373ff610c

Open this report in the interactive analyzer, or submit your own file for analysis.