Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62a55f8f07dec7c…

MALICIOUS

PDF

79.9 KB Created: 2021-04-06 07:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f85b3f8e9d5a653cd8da52c352224eb2 SHA-1: 9756afaba4b2c7f20b4af08d774bae941f1e5b2c SHA-256: c62a55f8f07dec7cadc0320794d41d163c5433ad26d9c2b2596744b47fd1de3e
164 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malicious content distribution scheme, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the high ML classification score. The document contains numerous external links, including one pointing to a potentially malicious PDF hosted on AWS S3, suggesting an attempt to redirect users to harmful content. The ClamAV detection further confirms its malicious nature, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/aws?utm_term=health+o+meter+pro+fitness+body+fat+scale+accuracy
    • https://bamiwesuwo.weebly.com/uploads/1/3/5/3/135390748/ffda3c2f.pdf
    • https://xurulojoxog.weebly.com/uploads/1/3/5/3/135323168/8c61f65bfe4.pdf
    • https://mikugixu.weebly.com/uploads/1/3/1/4/131438693/gevadiket-xujunitekop-vamuxibejunas.pdf
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/4566348.pdf
    • http://bewewafip.scienceontheweb.net/38304133312.pdf
    • https://jefamiwufilidiv.weebly.com/uploads/1/3/1/4/131409158/6653765.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bejideba/sinotajiwopogozunalevuwok.pdf
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_a904fe0151404bd698f7a3adf1cffbf1.pdf?index=true
    • https://s3.amazonaws.com/kagedatabujo/ccna_security_210-260_exam_syllabus.pdf
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_a9afc88a6bc345fa978727e19fd89bec.pdf?index=true
    • http://newemepakirid.myartsonline.com/dikobobegagam.pdf
    • https://uploads.strikinglycdn.com/files/84ba6e78-df7f-4763-bbb5-71f5980f72f0/40868225256.pdf
    • https://uploads.strikinglycdn.com/files/c2b1b2ab-c312-46fb-b6ae-1475e120449d/senapuseg.pdf
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_9efc20f97d1d4d018c6482359fca9f60.pdf?index=true
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_1e1175912bc54bb490239a0281dc2b62.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bdc963c0-04aa-485e-ae7a-c73bf0e22095/tugixadaxalidune.pdf
    • https://s3.amazonaws.com/tozaduliwubega/tricks_to_solve_binomial_theorem.pdf
    • https://c30b87d5-e38e-4f4c-8f61-e356d9eaafe8.filesusr.com/ugd/347120_3815e3a431ea4d80a06d290e4239bc65.pdf?index=true
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_c9b7db9070da430eaf2d114c2dfadc49.pdf?index=true
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_68dd7e12070a4c78a5f49dc915da6a69.pdf?index=true
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_07f24b3e4a024e7ea9c53208d827061f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fe9d279a-b9fd-4787-8b6c-bee4d6dd839b/my_sony_bravia_tv_wont_turn_on_red_light_flashing.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_off0000f33f.bin
179ea8149e1bbbd58db869730728cd38785776bc636008c620cc75a51426b132		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF33F 5600 bytes
font_01_sfnt_off0001061b.bin
7b29f042478ed22a10d006a358a4166be43f7bdd05771e41ef8c08268ec832f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1061B 12480 bytes

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