Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7ded6fec15fde8…

MALICIOUS

PDF

88.5 KB Created: 2020-12-22 03:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c10c2b4f9f55bea6354117acee2e20fa SHA-1: 754dcbd79b9c520a6c1a6893be1a8a20d52a7cec SHA-256: 4d7ded6fec15fde8c4f34eda835f0e404200d2cbd939498a5754d019c47db1d1
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating it contains malicious redirector links and is part of a link farm. The embedded links, such as 'https://traffking.ru/aws?utm_term=lse+personal+statement+guide', are designed to lead users to potentially harmful content. The document's structure and the presence of numerous external links suggest a phishing or scam attempt disguised as a personal statement guide.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffking.ru/aws?utm_term=lse+personal+statement+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486192/normal_5fb680f7e33aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f8c5893be953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_5faec5638c24e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_5fc107477725b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f88dcf554f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5f98550916786.pdfIn PDF document text
    • https://xapefawisago.weebly.com/uploads/1/3/4/7/134771693/754a19694bd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413590/normal_5fa6f6c1c25f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f887ea0812a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5fbd2cad14200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486374/normal_5fd286b51dad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454420/normal_5fd80e80bf379.pdfIn PDF document text
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/b16174e1ee8279.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/magapeguwabe/classification_of_crabs.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/74540718390.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/dakipobezeruvemom.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/test_bank_solutions_manual_and_test_bank.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC3 5100 bytes
SHA-256: 478de6eef9034b3ae37dd0604cfdecd775fbaeb1d1d1ab6be2ea2af8fee40d59
font_01_sfnt_off00012100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12100 11136 bytes
SHA-256: 1c1829f84ddde734a8baba4f456b1bbbc9aa39ed4baf654e6645524482f486ed
font_02_sfnt_off000146a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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