Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f5e2f9aed2769c…

MALICIOUS

PDF

80.9 KB Created: 2021-01-26 16:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fe4ef0bcfc3a3733f2d61afb7164112e SHA-1: 108ec826287bfdfca7618d7d29fbe1ed7d3df8b1 SHA-256: 30f5e2f9aed2769c06de627f5f127ae5e711d8ec014abaaa8af7ee3eda61cb82
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=sedig+enneagram+test+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_5fd821c4493cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454170/normal_5fe3d5622f803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_6009d9cb24228.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/dyhcyhj/16292304040.pdfIn PDF document text
    • https://bukekumagisalej.weebly.com/uploads/1/3/5/3/135333054/7863022.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366627/normal_6007bb9ac4a46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469105/normal_5ff64e9e45931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423195/normal_5fce5aa85f62b.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/jatuxeta.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/aMjgjiL/street_fighter_4_free_download_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488339/normal_5fef35adbfe22.pdfIn PDF document text
    • https://lipamonevarila.weebly.com/uploads/1/3/1/4/131453989/kijejezozis.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/werowibovezoje/seliga.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/56445386191.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/50648199380.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95D 5296 bytes
SHA-256: 1d1b02b259f844354bdb1b5061b33cc0dd833f8ba308522c210aa92bb4671845
font_01_sfnt_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 3220 bytes
SHA-256: b304fe7fd2b025d198f16c6735c7c52722152756389f6e3fe11473aefeb7f282
font_02_sfnt_off0000f872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF872 11420 bytes
SHA-256: 073925bc31de5eb6801953285d3897798ed63433feb6a88b694f549255d79b9e
font_03_sfnt_off00011f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7C 16116 bytes
SHA-256: acdc7345fd7c724e0f83f99756c334a81566d7f1ced1780f830934d9e28cbf4f

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