Malicious PDF — malware analysis report

Static analysis result for SHA-256 0081a7aa7e6dd43d…

MALICIOUS

PDF

79.2 KB Created: 2021-01-17 15:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f6b258c7ada105ea2ce1eae1f73de972 SHA-1: d3e69e3eabe27fd346070cd274a8df7678a0ad9f SHA-256: 0081a7aa7e6dd43db719a1259d1e7a6a3d453e31a37126a3fe8068c0eb52c381
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. Another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute a large number of malicious documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://traffine.ru/wb?keyword=halloween%202020%20movie%20list In PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/22f798.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/iehi0WW/14162694761.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/nibip.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/i1jiRhj/vaputozone.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/c414041.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/injahbf/96243949802.pdfIn PDF document text
    • https://vobikonim.weebly.com/uploads/1/3/5/3/135390296/guwegojowob-kevuxata.pdfIn PDF document text
    • https://zivawopoxiba.weebly.com/uploads/1/3/4/3/134355714/d268d.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/gavexilatuvitaz/wandering_earth_english_dub.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/wijefopoj.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/redogosizinilodelasi.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/20470572396.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/90095476051.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/chanel_christine_leda.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/31339802902.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/the_nicest_place_on_the_internet_google_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/2006_chevy_impala_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/sinorijetiduruxit.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 5124 bytes
SHA-256: 3f271c20f9d827f6041d3ca5d86e49788bcf4c018b97e801f44ea487d504e7f7
font_01_sfnt_off0001097a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097A 11280 bytes
SHA-256: e49f98ab5c5ce796bf749ff7a79a4a01058436ddc4ff36cc7a278f0ce1c8a776

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