Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9593cc61fa22860…

MALICIOUS

PDF

68.3 KB Created: 2021-01-06 12:35:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c60e59ea96d054ad60a2be7c8506dac6 SHA-1: 5b15cb55ee65ec3cd9e1ae0c3f81d0141f770fbf SHA-256: c9593cc61fa228605f2b90fc0a15c01f79d95afb47f989fbbba398c361221b54
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also assigned a very high probability of maliciousness. The document body, though heavily obfuscated, contains references that suggest a lure, and the embedded URLs point to suspicious domains, indicating a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=arregui+safe+manual In PDF document text
    • https://bagetakibejo.weebly.com/uploads/1/3/1/8/131871627/da39dc0a9.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/SiTFibm/country_music_awards_2020_tickets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456121/normal_5fe7bc9b1cbe8.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/koduka-manunadiwebawof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403533/normal_5fa84f77dd6a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_5fbb4b3b12cc4.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/lhepvha/age_of_war_2_hacked_unblocked_games_77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490370/normal_5fe19bed1db7d.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/itjjjiE/xofurovone.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/25lKkEo/81791960449.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jotizifime/91099063699.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/67982941727.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/wipup.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/airline_security_check_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/88294482857.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_off0000d16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16B 5076 bytes
SHA-256: 80bade92fafeef7f57bf6907abf7f0b88120841ae7e1047db4f154c64ff8a34a
font_01_sfnt_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 9760 bytes
SHA-256: bc4e6c7f603677008718d7af7ea80bdb9821731798d88c6938727e7bd4527395

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