Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e4c2cbbead4426…

MALICIOUS

PDF

117.6 KB Created: 2021-02-13 18:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7baff9e390e28f85cbb5e2050ed07ae1 SHA-1: 1d87e899ac3dd912b22660b6bb13d3a954332a36 SHA-256: e1e4c2cbbead4426dbb91ee836e65a9773c69c6ccf72c1edbb4c8fee55e867c8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as a phishing trojan. While no scripts were explicitly extracted, the nature of the link farm and the detection suggest it may host or lead to malicious JavaScript or other payloads.

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://maypoin.ru/wix?keyword=marisa+coulter+villains+wiki PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377410/normal_5fe1409829219.pdfIn PDF document text
    • https://lazezareb.weebly.com/uploads/1/3/4/3/134311903/3054043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379844/normal_60050b8682502.pdfIn PDF document text
    • http://rokoxuj.iblogger.org/safevunapabigagiwadevasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_60249562da38e.pdfIn PDF document text
    • https://bonesinidojesu.weebly.com/uploads/1/3/4/5/134591006/4973683.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5fff92c0ca1df.pdfIn PDF document text
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/b969d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473640/normal_601966a166f22.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/ropajapewokef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367268/normal_5fe17c6102ef4.pdfIn PDF document text
    • https://suxozunepewax.weebly.com/uploads/1/3/2/8/132814427/9219948.pdfIn PDF document text
    • https://movakesomerinid.weebly.com/uploads/1/3/4/5/134528648/0823ee484d1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402717/normal_5fe31307ce43e.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/86b5af9525e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujepuxa.rf.gd/free_validity_sensor_software.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/fiwikutosavube.pdfIn PDF document text
    • http://dirujuwut.epizy.com/vefetupolutake.pdfIn PDF document text
    • http://tamakibegotilo.epizy.com/amorous_adventures_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/kakaotalk_emoticons_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_off000192d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192D4 5016 bytes
SHA-256: 13038ccdd279117367408e6a8aa7bbde4fa46d4d38258f10f00b435903b6589f
font_01_sfnt_off0001a415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A415 10660 bytes
SHA-256: 6b0ec75900669655e0891d158570f4f7b40e0b3ea78255ff23b3257af54018a1

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