Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af699d5da8c9925…

MALICIOUS

PDF

75.4 KB Created: 2021-01-15 01:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1317f079dd77cbbc18193ce15e89c1b0 SHA-1: e70ab2cb416d3f8fc64865b6995e4bfe1ef80904 SHA-256: 6af699d5da8c9925595409aee0eabb4d82cc1ee458da0e05737bbaa8800b3579
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains multiple external URIs, including one pointing to 'traffnew.ru', suggesting an attempt to redirect users to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for malicious links. While no scripts were explicitly extracted, the overall structure and URL usage point towards a phishing attack.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=google+sheets+split+column+by+comma PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468812/normal_5fd9656b4fff1.pdfIn PDF document text
    • https://kikeletiwemuk.weebly.com/uploads/1/3/4/6/134671512/puropuruz-xesadefejaxita-jegil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460055/normal_5fc53c69140dd.pdfIn PDF document text
    • https://site-1196632.mozfiles.com/files/1196632/nuxuvosewozozituna.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/4718243.pdfIn PDF document text
    • https://site-1174077.mozfiles.com/files/1174077/sasibezedotasavowotawuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5fa2aab97db84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494139/normal_5ff68949e6aa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5ff9360dec930.pdfIn PDF document text
    • https://site-1174695.mozfiles.com/files/1174695/savadirozidoz.pdfIn PDF document text
    • https://site-1251335.mozfiles.com/files/1251335/1st_grade_free_printable_reading_comprehension_worksheets.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/lakadutof/boxurelodofeluro.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_off0000e418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE418 5524 bytes
SHA-256: e48c95067d4a19fbba8f404d76c354ef1835f84a8c1e7b9215d47e85f8dbf425
font_01_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 12240 bytes
SHA-256: 8ddbb80175be5efa725e0402960e9ae767bc0bf849a106416547914ced7611af

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