Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eab8ca1d4c79b8c…

MALICIOUS

PDF

76.3 KB Created: 2021-01-13 13:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 31709b3693948ae5a567a60eaada90b2 SHA-1: 856eb2b7f5961974bcd83f8f721c2b55b951c237 SHA-256: 4eab8ca1d4c79b8c3d77242eaf22f2d042b5d33e99f54872626dec553ee1a9a6
214 Risk Score

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 and routes users through malicious redirector infrastructure. 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/aws?utm_term=kaabil+full+movie++in+720p In PDF document text
    • https://cdn.sqhk.co/waderapal/hiagj3n/africa_empire_2027.pdfIn PDF document text
    • https://batatifenosi.weebly.com/uploads/1/3/4/5/134513642/morebu.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/MMjaZgf/billie_eilish_wallpapers_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/618wwEy/epic_seven_tier_list_july_2020.pdfIn PDF document text
    • https://naxigekaserudo.weebly.com/uploads/1/3/4/6/134644932/1541621.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/oOhjchh/guess_the_movie_picture_quiz_hollywood.pdfIn PDF document text
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/penewadobi.pdfIn PDF document text
    • https://nojemalof.weebly.com/uploads/1/3/0/8/130873850/moverul.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/qhcheig/pozomigoris.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/qijGjeK/66707483858.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/levovod/60252705807.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/ajax_response_data_format.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FA 5296 bytes
SHA-256: 35389322bedf771968c47a115c70d3f70c6de733adf54954fd21f42be9315155
font_01_sfnt_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 10604 bytes
SHA-256: 62d5fdeecfd10b08bbb9ab348f6eb4ab9da4e501a54ff5603c0b2f61232a07c6
font_02_sfnt_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 17908 bytes
SHA-256: 3d38ba28679fabd82482e2e3bee93b79fd66166cbf970003ee3f321aa34bde2a

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