Malicious PDF — malware analysis report

Static analysis result for SHA-256 844b0a7b0e5d13b2…

MALICIOUS

PDF

71.4 KB Created: 2021-01-10 01:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 49339bd168e9fa143c72678b1632845d SHA-1: 1d1fb1c61c0f330176094aba1755157986259da9 SHA-256: 844b0a7b0e5d13b2cc6f159938e05dcc06f5969af7365af4d830a0ec5ff4cbed
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to PDF files hosted on 'mozfiles.com', suggesting a link farm or redirection mechanism. The primary URL, 'https://trafffe.ru/123?utm_term=3rd+job+advancement+maplestory+mage', is likely used to lure victims with a job-related pretext.

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://trafffe.ru/123?utm_term=3rd+job+advancement+maplestory+mage PDF link annotation
    • https://site-1172123.mozfiles.com/files/1172123/art_therapy_certification_online.pdfIn PDF document text
    • https://site-1194286.mozfiles.com/files/1194286/mutazakabajamugev.pdfIn PDF document text
    • https://site-1178235.mozfiles.com/files/1178235/top_network_marketing_professionals.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/dc7be9aec23c899.pdfIn PDF document text
    • https://dujomujur.weebly.com/uploads/1/3/4/8/134883281/sajukuvipefu-winovapon.pdfIn PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/mimomafukax.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/satifemosa.pdfIn PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/dipageleful.pdfIn PDF document text
    • https://witerimapiw.weebly.com/uploads/1/3/4/5/134599407/ledukivopul.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/xakusineba/angielski_czasy_gramatyczne.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/business_email_format_spacing.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/baptism_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/44921095449.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_off0000d874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD874 5840 bytes
SHA-256: ef29d6bdedaf9ed26de78a83223290835b7f44a7a696be87e74f1a610554c358
font_01_sfnt_off0000ec47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC47 10820 bytes
SHA-256: be870cdbfedc4b2993515e47d99dce507ef4ef42982db2093dcc9db9648cdbe9

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