Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da61cd42f16ce79…

MALICIOUS

PDF

73.3 KB Created: 2020-11-19 15:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cc68303116d88934e674f1d0fd92df90 SHA-1: 217b6f8b49106fdbabe22fefd2e212327d01e814 SHA-256: 2da61cd42f16ce79e1893422cda0f3cd6d8faa1188cca0c47ce51332d932c58c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external links points to 'https://traffnew.ru/aws?utm_term=mitral+valve+prolapse+aha+guidelines', suggesting a potential phishing or SEO spamming attempt. The ClamAV detection and ML classifier further indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/aws?utm_term=mitral+valve+prolapse+aha+guidelines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5fa5418c65ce5.pdfIn PDF document text
    • https://tefuxaforubexo.weebly.com/uploads/1/3/4/4/134446539/9067574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_5f9f0f09b886e.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/d9facdae05bd5.pdfIn PDF document text
    • https://punotajevi.weebly.com/uploads/1/3/4/2/134266109/voreduxa.pdfIn PDF document text
    • https://sozipufejelaj.weebly.com/uploads/1/3/4/3/134352325/5069255.pdfIn PDF document text
    • https://wamokanudetavud.weebly.com/uploads/1/3/4/5/134510572/gamaguxosamog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5fa7cb78855cf.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/putelekireza/24976501544.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/vegosibedilukefateb.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/imgur_random_global.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/pufabotaturoretorajifu.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/mariah_houghton_rideau_instagram.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/ps_i_love_you_google_drive.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_off0000e356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE356 5284 bytes
SHA-256: 25f5428d13f5cc2c588f2239015b9bc500fee0c4cd20210b4f57296882b2a3ec
font_01_sfnt_off0000f557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF557 10200 bytes
SHA-256: 72e2c89ce2be65a6da32b1c72bb6ce47bce9a94bea99ce33e5137ebdb7851f60

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