Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3432b3fe2cdf65…

MALICIOUS

PDF

71.2 KB Created: 2021-01-17 14:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 44cd69c43afb71e6a6726574960c513e SHA-1: b00efc4d3f39efb2d7c19b0f3ff16a205cebed98 SHA-256: 7a3432b3fe2cdf65ffc8614c9b0ab417ee6cd66c1ec8ab37a965826582c354a5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on suspicious domains and are presented as legitimate documents like user guides. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm used for SEO manipulation to drive traffic to malicious sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

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://traffset.ru/aws?utm_term=focusrite+control+user+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387921/normal_5ff482105ecfb.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/f3db7de.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/967qsok/influence_meaning_in_gujarati_language.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_5fe2ca4b7551e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484994/normal_5fe5d3e4bdedd.pdfIn PDF document text
    • http://xidotamasaw.22web.org/netbeans_for_windows_7_with_jdk.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/1JOgjPQ/blundstone_boots_sale_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5feda2f5f31b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5feb1a00a3537.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453888/normal_5feebeb766e7e.pdfIn PDF document text
    • https://cdn.sqhk.co/zudatona/80Xn4xD/34560938179.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/zaxulaxavurare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473023/normal_5fe166922180e.pdfIn PDF document text
    • https://kibodowusi.weebly.com/uploads/1/3/4/5/134588916/buxunazixagum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487631/normal_5fc88450b9640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejufunekopal.epizy.com/gasivozif.pdfIn PDF document text
    • http://gakupoxefale.epizy.com/danenatutubade.pdfIn PDF document text
    • http://kowotasube.epizy.com/9030360286.pdfIn PDF document text
    • http://lijazujarakowom.epizy.com/wowatitexokugir.pdfIn PDF document text
    • http://nasedelowose.rf.gd/jogos_ppsspp_gold.pdfIn PDF document text
    • http://kifozelig.epizy.com/commandos_2_game_free.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_off0000d7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D6 4852 bytes
SHA-256: b68fc84003273933d81865bfd8d2a77700dfc403b0347f3b1d5367acc47a8fdd
font_01_sfnt_off0000e869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 10960 bytes
SHA-256: 904b88e015754b122b890418572466b1e1abbf420f6ce7a9f73892a755a0fa2e

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