Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c890fabd77f414…

MALICIOUS

PDF

72.4 KB Created: 2021-02-21 15:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd8b86763922df4cde79f0aa91653234 SHA-1: dbbcd111b9e1f9e53d85d1de2c11342a34abe20b SHA-256: c7c890fabd77f4140093b1e5f1ef1edfd99ca8f9ae0367d150519c0f74e1b8ae
164 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a potential for downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=filmywap+bollywood+movies+2020+download
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/budek.pdf
    • https://static.s123-cdn-static.com/uploads/4366949/normal_6003d15b4dcee.pdf
    • https://velelamoju.weebly.com/uploads/1/3/1/4/131438442/zusok.pdf
    • https://cdn-cms.f-static.net/uploads/4381091/normal_602c20daad76c.pdf
    • https://cdn.sqhk.co/xibumediw/0Phg3Sa/jopaguditowodirodulur.pdf
    • https://mavakonagidesa.weebly.com/uploads/1/3/1/4/131483278/953086.pdf
    • https://jedifugidu.weebly.com/uploads/1/3/1/3/131382595/8491598.pdf
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/dixofobaw_tarutavefowide.pdf
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/famusuradogika.pdf
    • https://zegikawa.weebly.com/uploads/1/3/4/6/134640481/rolemiviwelexilug.pdf
    • https://fazijexin.weebly.com/uploads/1/3/2/7/132741066/pasipojeso.pdf
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/3078069.pdf
    • https://static.s123-cdn-static.com/uploads/4374379/normal_600382afd3556.pdf
    • https://tifevijokob.weebly.com/uploads/1/3/5/3/135351552/jesug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dupetomumipur.rf.gd/quality_assurance_engineer_resume.pdf
    • http://godutiliwaganos.rf.gd/yellow_journalism_spanish_american_war_worksheet.pdf
    • http://tafinefonekon.rf.gd/lalebanineb.pdf
    • http://ladipuxot.rf.gd/22373732156.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dead.bin
64e94c7605c18048586b1c9a7aeac016275390329a0feea616bcf687cb311ac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAD 5632 bytes
font_01_sfnt_off0000f1dd.bin
f3cbeb19c6606c5a3f7d333a745faa792235733917899b51b7277403ab0c784e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 10148 bytes

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