Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa285c6bdf7569f…

MALICIOUS

PDF

68.8 KB Created: 2021-03-05 12:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b45e05d040b1f2473ef30ec57e3643e6 SHA-1: 4aac7db57f425a44e93dec998c076a871822a4cd SHA-256: afa285c6bdf7569f4ea4e66f1b585b8250a508c198f4848011ef8f643cd305fa
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDFs, suggesting a link farm or SEO poisoning tactic. One of the primary external links, 'https://jacksth.ru/award?keyword=new+king+james+bible+for+sale', is likely a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/award?keyword=new+king+james+bible+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414164/normal_601ca2041d061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_601b2b6fe8bb2.pdfIn PDF document text
    • http://xitodefigatefuj.medianewsonline.com/gapodirofixagemiginera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_602a12ebac75b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413835/normal_5fe2065a1a542.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d2994b66-3230-442e-ac22-dde5692340e4.filesusr.com/ugd/0182ef_c5c775de48ca46e8b26e2a7e7db46ddc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/kobekerafojafuton.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/dell_stylus_doesnt_work.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_fd94ee661456403084fa071c8fc8614b.pdf?index=trueIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_d2b12b7daa394b51bde5b5168ef31cc4.pdf?index=trueIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_2fa504c943114006aa09ca4a78109b10.pdf?index=trueIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_bb84499703b04d1482ea0e5841e61032.pdf?index=trueIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_3d329b71c37646f0b4cc6d65bdee2502.pdf?index=trueIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_f954839ca1b44eacb9a83dd7a290a47e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/cash_flow_template_for_startup_business.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/dolewaki.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/nozanilefopedekadanuxire.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_23222c90ff9b4b48ae7ff0a3dc77a329.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/anagrama_definicion.pdfIn PDF document text
    • http://wilaroxu.atwebpages.com/how_much_does_it_cost_to_service_a_refrigerator.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_22c2d7226b0d45979dfa67cf3a9a8cc0.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_d2ce5af782184c00853b833026e2b0b2.pdf?index=trueIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_6d3f1373e0d146d484104455dc25ebea.pdf?index=trueIn 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_off0000cf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9A 5428 bytes
SHA-256: 5f0f881415771e45468740b8904bb43da89da5e58b03c31e3608d0e1abfd10b9
font_01_sfnt_off0000e223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE223 10516 bytes
SHA-256: 7846643bdf5b4ec83decf30a7c9e1be9511e8277b1d1c6cd027a373f6587636a

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