Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2ad0cd9d8df5e27…

MALICIOUS

PDF

68.6 KB Created: 2020-11-13 06:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 68eb75be602261f385cbb533a2db81a9 SHA-1: 1c4e12dce9e71fe8253f6ad0269e7652dee4eecf SHA-256: a2ad0cd9d8df5e2728e2215c80ad37f25fc058262c94b3d125451f1af9608188
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to redirectors and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly suggest malicious intent, with the primary redirector being 'https://traffmen.ru/aws?utm_term=ebook+reader+apk'. The ML classifier also flagged this PDF with high confidence, aligning with the ClamAV detection of 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=ebook+reader+apk In PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/fosiri-vasulex.pdfIn PDF document text
    • https://murenazomof.weebly.com/uploads/1/3/4/0/134012525/subetutijitigum_duxuvif_pufuw_seluwazowivija.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/gurokilepipujo.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lafomu-fowesutom-dabikituduxun.pdfIn PDF document text
    • https://jewuvasoseximu.weebly.com/uploads/1/3/4/3/134355154/monupazivevexemox.pdfIn PDF document text
    • https://sowosevutab.weebly.com/uploads/1/3/4/3/134311467/belejejitujuzalif.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/tobobowu/22186297409.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/fawowovumujose.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/86243843576.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/heart_talk_cleo_wade.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/weekend_camping_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/71231548964.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/delonghi_safe_heater_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/wumumoderiwex.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_off0000d0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B6 4904 bytes
SHA-256: c95a49f49813b17e5d58c084f4f590f82fb711d0572ed9c5786a4056c7052e09
font_01_sfnt_off0000e16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 10692 bytes
SHA-256: ae290244ebf30be4c0cc023fac46dbb2e63a424cabaf2b43042061321297f8cf

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