Malicious PDF — malware analysis report

Static analysis result for SHA-256 8694411f89730c04…

MALICIOUS

PDF

67.6 KB Created: 2021-02-15 09:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55a2030b65401c306a31165ccba2ca69 SHA-1: 24b665b2c5789aa26b76fa5e50d74768aefc4d09 SHA-256: 8694411f89730c04d871a2a48cb7982862437bb09c3d36715f9b4c84d69bc112
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a phishing or SEO spam campaign. While no scripts were explicitly extracted, the PDF_URI heuristic points to external URLs that are likely used to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=similes+in+lord+of+the+flies+chapter+10
    • https://xozojijeb.weebly.com/uploads/1/3/4/4/134436315/3903710.pdf
    • http://copyrightram.net/puvomibaboczhiq.pdf
    • http://bijopesenof.iblogger.org/dodozajoxajizotafi.pdf
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/3527664.pdf
    • http://fastgetme.online/ignatian_guided_meditation79y3z.pdf
    • https://vejazejama.weebly.com/uploads/1/3/1/3/131381369/5449364.pdf
    • https://sapilijufidukuw.weebly.com/uploads/1/3/4/9/134901451/bugodopurug-buxub.pdf
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/jitopefujili.pdf
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/redekumupe_wapilumu_vupugemipijuliv.pdf
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/aff15082.pdf
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/5347938.pdf
    • http://custits.space/kozikizexabegaagab.pdf
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/mudulinofe.pdf
    • http://giocodigital.fun/jabapujubitivogokudesif5sdrp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kazowaz.rf.gd/der_blechtrommel.pdf
    • http://tevomare.rf.gd/big_ideas_math_algebra_textbook.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb9b.bin
39b33b66616f6a5e048744d83a08b6d3569c706a98d791e1fcc2663835205310
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9B 5692 bytes
font_01_sfnt_off0000dedb.bin
3cf78df95e9517b6fe5a9343fb8336f609b1f35135d9bedc88eb8ec2cf8aebd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDB 10112 bytes