Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fcbf63f562a3820…

MALICIOUS

PDF

69.4 KB Created: 2021-05-18 21:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e88cdb7d7047e6b3936ac7e05e6daef2 SHA-1: 1eb79fb80594e117de482ff0817e97b1b3139073 SHA-256: 0fcbf63f562a382035abfdeeb9d91ec8f095d6e066ad5ad0fd434ee4bc5d6fe2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One prominent URL, 'https://bologen.ru/strik?utm_term=how+do+i+program+my+panasonic+n2qayb+remote', is presented as a search result, suggesting a lure. ClamAV detection and ML classification confirm the malicious nature of the PDF, identifying it as 'Pdf.Phishing.Trojan'. The presence of embedded links and the overall structure suggest an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=how+do+i+program+my+panasonic+n2qayb+remote PDF link annotation
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/bojoruweg_vujoluw_joguxufenulew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_600a1f801344a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_6021f19abddc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_60397a325a30a.pdfIn PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/9603350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501046/normal_5ff4bcfbdb8ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeputujakajaj.epizy.com/xivex.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/53273496203.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/commas_in_lists_worksheet_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/is_defending_jacob_going_to_be_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/71169664409.pdfIn PDF document text
    • http://pojisugafini.epizy.com/9578434726.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/indianapolis_colts_cheerleaders_new_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/cdcr_title_15.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/saruginegexafejolerumop.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/watch_sex_and_the_city_season_3_streaming.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/yahoo_groups_all_files.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_off0000d275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD275 5912 bytes
SHA-256: e77902ebc692b1b7c876b0eb29ad0b24133ee84673632e60caf8189a9c2c1660
font_01_sfnt_off0000e68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68C 9792 bytes
SHA-256: afd48b06482c9f5edec4c85d68b07970c32984ee64523e7fff9d211c07a6e2d0

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