Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13725d5c322b03b…

MALICIOUS

PDF

85.1 KB Created: 2021-06-11 03:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dcc5463d6fc3199ee4254788470e19ce SHA-1: 50ca1abfb1d0a36d9ab70260c2afa722571f8320 SHA-256: a13725d5c322b03b989f34e2444a5118f1cce54a8f0017df81f685cf4f071618
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO spam campaign. It contains a large number of external links, with the primary URL being https://pelibifir.ru/123?utm_term=responsive+email+template+html+code+codepen. No scripts were extracted from this sample, but the heuristic PDF_SEO_LINK_FARM indicates a mass of external PDF links, suggesting a coordinated effort to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=responsive+email+template+html+code+codepen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383929/normal_603229589b353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413474/normal_602aa466d0369.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459921/normal_5ffcf6c16b4a1.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4385207/normal_60b4c9924f9a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387581/normal_5fe2d3da6707e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417664/normal_60b8742e1af58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455390/normal_60624ae72f317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5fda63c597db5.pdfIn PDF document text
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/wejiribuxawa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408009/normal_6008e302494bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_606551e55b005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_60c1f3cb9d4ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_6047efa484b45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375509/normal_5ffa388e2fcdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466661/normal_5ffc60d14eb52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457312/normal_606d984d338e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383452/normal_5fe7e9c026732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468270/normal_5ff5c63ecb8b7.pdfIn PDF document text
    • https://puvojokuxika.weebly.com/uploads/1/3/5/9/135985507/fb8c843a1810196.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lagawiwefe.pbworks.com/f/scriptures_to_read_when_fasting_for_a_breakthrough.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/download_sony_vegas_pro_13_32_bit_full_crack_free.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_off00010f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F98 5284 bytes
SHA-256: 87141ab612045e7cb5648480a220b99391fccbddb498d911b59f8c2541831b01
font_01_sfnt_off00012171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12171 11080 bytes
SHA-256: 1e13f9ee939cfe8fa3a88c0a1c5ee4b1ecc3796a5acaa7f22743b134bf2aaa18

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