Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0987d927d2bd85…

MALICIOUS

PDF

79.4 KB Created: 2021-03-23 04:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 497b316b1199932fa7c4b7f03aeb19df SHA-1: d64c8143ecf2b8abc0e02fdb241d1c636f5b84bc SHA-256: ea0987d927d2bd85dfea440601501b4e9ca58b5b88c8108cca1f5e556a7d19dd
196 Risk Score

Malware Insights

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

The PDF file contains multiple external links, with a primary URL pointing to a suspicious domain that appears to be an SEO redirector for a 'mod apk' download. This suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support the malicious nature of the file, indicating it's likely a phishing or trojanized document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=kingdom+new+lands+mod+apk+1.3.2 PDF link annotation
    • https://furedanoduribi.weebly.com/uploads/1/3/4/6/134681858/wigejul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_60167e0192103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_60261c4c95c68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453337/normal_603c4e801db85.pdfIn PDF document text
    • https://dedeluruxizo.weebly.com/uploads/1/3/4/3/134305162/7479749.pdfIn PDF document text
    • https://fenazimo.weebly.com/uploads/1/3/4/4/134437137/62d00a7c4b91.pdfIn PDF document text
    • https://puduwuxibipufu.weebly.com/uploads/1/3/5/9/135966859/60661db73671.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://16cc4848-9a85-487f-bc1d-da55f68f8448.filesusr.com/ugd/dcf86b_30ec8cfb21364313804c3772478f2392.pdf?index=trueIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_f828481f50574edb831a390199ab612e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/24934819550.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/how_did_the_end_of_the_cold_war_affect_latin_america.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/stylesheet_in_html_link_rel.pdfIn PDF document text
    • http://xufoziminep.onlinewebshop.net/speak_now_1_teacher_s_book.pdfIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_aa4ce62c41ab4e4bac500a43d87db0c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lezerawe/gmetrix_illustrator_test_1_answers.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_c72c1ec405a14284aa864148edd12ff0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rejiner/free_bhajan_aarti_kunj_bihari_ki.pdfIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/nutritional_biochemistry_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/gafel.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_95b5ba41b507421f93eee5263e2d7f70.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 5396 bytes
SHA-256: 3fed382ff1b51248381a1c10fb2002846ea5ecf2b4e5c23063eac5fddd79bb30
font_01_sfnt_off0000fdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 10784 bytes
SHA-256: 47ad1885c66bc8668b6174c30635604042def5c0f9b56865c0c2b0c1d4c14c80
font_02_sfnt_off0001225e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378