Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30cedcbd0e2a471…

MALICIOUS

PDF

98.5 KB Created: 2021-03-06 07:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c98badc9b9f8527d9d9b4b3545528a42 SHA-1: da82509b5d15f59b8bd1b1a6bad0a625d360ee53 SHA-256: a30cedcbd0e2a4718443ff4f436ea32263f41a600d00609c5e3b4a5dcf234b73
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external links, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/award?keyword=la+biblia+catolica+latinoamericana+para+leer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452157/normal_5fc7e37babab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450734/normal_600c5414db868.pdfIn PDF document text
    • http://kazerurido.iblogger.org/fowetowufefurugi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486356/normal_6007fe4526dd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449776/normal_5ffaae27e204f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424953/normal_600219849d2cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_60381bc373500.pdfIn PDF document text
    • https://zomoxiwoginu.weebly.com/uploads/1/3/1/6/131637743/3f42a361b6a036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462066/normal_5ffd689236abd.pdfIn PDF document text
    • http://wukijomenanop.iblogger.org/94157943129.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458122/normal_5fe0c6eda5a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_602986e89ac86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_6018ff24751f6.pdfIn PDF document text
    • https://biweworu.weebly.com/uploads/1/3/4/5/134525234/5767046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417818/normal_601b65bc8be2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424637/normal_601379d06516f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://momewitu.epizy.com/80206390856.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/96761975772.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/basic_grammar_interview_questions_and_answers.pdfIn PDF document text
    • http://fapedixu.epizy.com/wanubupogizodokavesenu.pdfIn PDF document text
    • http://zugukurakib.rf.gd/76846980469.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
stream_002_off0001449f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1449F 4980 bytes
SHA-256: 48896543aee849b86a3b996e3c6febe371d0da990bee1bd5adfb18858c2f24ba
font_01_sfnt_off00015577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15577 12184 bytes
SHA-256: 39082ff12554d94e94470e216743010a38f7ee66e2bef2d2b5578733129f596f

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