Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c64348ec15e353e…

MALICIOUS

PDF

75.2 KB Created: 2021-02-15 22:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9066fd9e1411637e30db0e814a74b7db SHA-1: c786e2fedbe03f533532fe08526d1fb489c11712 SHA-256: 0c64348ec15e353efa1764d8769782ca2d92c262ddc5c58dac689ac606abce84
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=how+to+use+ryobi+palm+router PDF link annotation
    • http://juniwasobevi.22web.org/bet_365_poker_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_5fd877d09acac.pdfIn PDF document text
    • https://cdn.sqhk.co/zolususux/KZhfRij/word_scramble_cheat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5ffdcc9219380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485714/normal_6011ee99dc6c2.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/ChtihSF/friend_finder_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414334/normal_5fcbe6cb2239c.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/LRNTpge/islands_in_the_stream_remake_rap.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/icgegdf/ios_store_app_intune.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xujalupa.epizy.com/radipadapejesumobapanoz.pdfIn PDF document text
    • http://jilevatawew.epizy.com/78146632135.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/popuki.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/66437309841.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/assassin_s_creed_identity_apk_latest.pdfIn PDF document text
    • http://guvoperar.epizy.com/45903984792.pdfIn PDF document text
    • http://tukurazetuxud.epizy.com/fha_guidelines_student_loans_payment.pdfIn PDF document text
    • http://jidodurej.epizy.com/66085901798.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_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 5260 bytes
SHA-256: 561ad7cccaa53453ae8de90e73b10c26bd69a0f40939b3c9c2a976d9063c952d
font_01_sfnt_off0000fbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 10784 bytes
SHA-256: fa82c771cc7bcab9a47e2be8fd3a12bc8893d8e23922639f0b4f810113f2bafe