Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a68503d78f7bfae…

MALICIOUS

PDF

75.2 KB Created: 2021-05-12 19:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 70e568b57e3b46893350d3f284e638e3 SHA-1: 579a423da8a0297b6b29a7396f3852deb643f275 SHA-256: 7a68503d78f7bfaec536e1450f8157b4238213beb1d642254bc2dd619f2a48ea
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://vilenefex.ru/strik?utm_term=massey+ferguson+baler+parts+online PDF link annotation
    • https://cdn.sqhk.co/wejuladuke/dgcVJic/56117963591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_602e6a94ec445.pdfIn PDF document text
    • http://tumbochka.space/16052766564hsyz5.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • http://hookup154.site/how_to_write_a_synthesis_essay_thesis_ap_lang6b90x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_6037da701d9cd.pdfIn PDF document text
    • http://copyrightmediahelp.com/learning_objectives_verbs0thja.pdfIn PDF document text
    • https://mogunugive.weebly.com/uploads/1/3/4/3/134381007/natupazozasaze-judukiwijaxuri-malekisivuxiron-wesutewep.pdfIn PDF document text
    • https://siromalad.weebly.com/uploads/1/3/5/3/135312661/1923722.pdfIn PDF document text
    • http://pokupka.space/manitoba_accident_police_reporty0r8y.pdfIn PDF document text
    • http://wonamesavap.iblogger.org/sobipisetujakufulul.pdfIn PDF document text
    • http://pejitirige.iblogger.org/nikolulugitederajidojo.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/lekezaru/activator_windows_7_professional.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/centre_parcs_longleat_map.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/43601825589.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/polk_psw10_specifications.pdfIn PDF document text
    • http://vifoxakusawe.rf.gd/important_marketing_concepts.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/ariens_engines_made_in_china.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_off0000e828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 5316 bytes
SHA-256: a5f790c835539ee1923248650e001b80680e82af0515340d506d8533aae4926d
font_01_sfnt_off0000fa63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA63 10940 bytes
SHA-256: d6f64a1dd8bcc6eaf0794d1bc5e72473367c7635b96ea81445a472280afd5e3a

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