Malicious PDF — malware analysis report

Static analysis result for SHA-256 abab482a5127ed6f…

MALICIOUS

PDF

71.2 KB Created: 2021-03-08 08:39:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 605e4d64ab55ef78a761908c8b0f54e0 SHA-1: 9908113d3ed0876d24526d4ba170a0eb5316743e SHA-256: abab482a5127ed6f3334522fa259148edc6bc5ebaba5e1d0cb014eb44aacd722
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to SEO-optimized PDF documents, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious content, likely for 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
  • 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://seumenha.ru/wix?keyword=tv+schedule+quad+cities PDF link annotation
    • https://cdn.sqhk.co/lezubenewago/tfjjZEY/kirat.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/jjznhcZ/the_room_movie_2015_trailer.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/tapelu/xetipozaxurenorakijivipiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/netherlands_visa_application_form_in_ghana.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/88133484106.pdfIn PDF document text
    • http://xidiredojowezi.epizy.com/botim_free_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/integral_of_x3_arctan_x.pdfIn PDF document text
    • http://bukogog.epizy.com/64880914637.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_3b8d11ad0e494bf38ddc346149ba3329.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobobowu/45955467854.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/puzumezeveramaru.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/how_to_use_sol_u_mel_on_couch.pdfIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_dfeb98bc3f1f46cc9b225f6490fe0736.pdf?index=trueIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_09f86b470e424594ab69064e9ce7831a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wixanarer/diablo_3_crusader_gem_guide.pdfIn PDF document text
    • http://mibexaluji.epizy.com/binozodozodirogawofefuf.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_off0000da4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4E 5068 bytes
SHA-256: 273ded26918f0251bb5c1808bffa3472ad41456571b782d3f89cfab97f3498a0
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 10464 bytes
SHA-256: b15ba8cd8477401551fb5b9bbd1512b88ec407ebf58c0b969c30772bc97ffd1f

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