Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e1b0d003babf3c…

MALICIOUS

PDF

71.8 KB Created: 2020-11-13 08:00:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 71e193b807ad56c633cfbdcb4db2e647 SHA-1: 7b0e0057e6349a5641ee623631d30230d20098a2 SHA-256: 34e1b0d003babf3cd81596b117447ca1f2506f712628fd383bcdce7761bb4c7c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing or malicious document, including a large number of external links and a high ML classifier score. The embedded URL 'https://traffnew.ru/aws?utm_term=bombsquad+mod+pack+android' suggests a lure related to a game mod pack, likely to trick users into visiting a malicious site. While no scripts were directly extracted, the PDF structure and URL farm heuristic point towards an attempt to distribute malicious content or phish for credentials.

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 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=bombsquad+mod+pack+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387815/normal_5f90ae4e22d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474987/normal_5fa8da364f07a.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/4225764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_5f9dc22a29e86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5fa866da82c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5f9f6666b8c68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f8ac82f863e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f8967dc35364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_5f97fd7959084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_5fa8039ab8264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2cab31c-ee02-4657-b430-8604e3d42ae1/genetics_word_search_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18770413-799c-4fdd-a55f-1a923d4d997f/92957041634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/247e0f08-eabd-4dac-abb3-723b6ec539d2/pipepewebilid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2ee903-f01f-4787-85c1-ed631e970627/zafukotaziwubulakog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7fd4dad-b811-40ac-ae30-18ef7d6afdeb/96344794926.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC520 5568 bytes
SHA-256: 47655934b7df70a2e83096ccada1197e3e7d24e8f8ae312d6c3a52887c0b7c1e
font_01_sfnt_off0000d7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F3 11064 bytes
SHA-256: 73ea9460d8f671bcb403a882f905250ba2ee11ef62ca913decb6b8c6ae805d33
font_02_sfnt_off0000fcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFD 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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