Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74ae88c40531e50…

MALICIOUS

PDF

71.7 KB Created: 2021-05-25 04:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: be6f70006996284200d9287061bf2666 SHA-1: 750bd980e508774d1e47712444956263b0a7ed6f SHA-256: d74ae88c40531e50e471dfaecb621a9c4c693a1a7b109e828dcd10c952bad3f6
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://golowaki.ru/strik?utm_term=area+of+a+parallelogram+worksheet+grade+6 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501501/normal_6013c9bee340e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403565/normal_5fc628901b75f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fc86a8ca4d37.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/eee37c2d86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5fe9e6b095ea8.pdfIn PDF document text
    • https://subefurova.weebly.com/uploads/1/3/4/5/134505332/wuluragowup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471946/normal_603490f9e7fbe.pdfIn PDF document text
    • https://jotelozaji.weebly.com/uploads/1/3/4/4/134484012/75d9b661340fed1.pdfIn PDF document text
    • https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/bisebon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5ff29cf7e4892.pdfIn PDF document text
    • https://mapivabivex.weebly.com/uploads/1/3/0/7/130776319/dipuli.pdfIn PDF document text
    • https://sulumakopata.weebly.com/uploads/1/3/0/7/130775191/568911.pdfIn PDF document text
    • https://dirukarizudabi.weebly.com/uploads/1/3/2/3/132303081/tepilafuwan.pdfIn PDF document text
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/8385321.pdfIn PDF document text
    • https://jarubobukifali.weebly.com/uploads/1/3/5/2/135297267/6582368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5fda8579d81a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477162/normal_5fe191506d447.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387590/normal_5fc7c66da6773.pdfIn PDF document text
    • https://nigerizebamogut.weebly.com/uploads/1/3/4/5/134596745/2123422.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/gebukil/dirt_devil_easy_lite_7.2v_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/bidogosaxiwekiro.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/63592381765.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/bakefifako.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/blur_game_ps4.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_off0000d896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 5752 bytes
SHA-256: 371c8462b9da3b0383e54cc7c6413931221d351711071696e25af22764c40e24
font_01_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 10300 bytes
SHA-256: 268cae05e4d0e52f31902bf08f765db15167ec02d82db3241ac8da1b6a30c7a4

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