Malicious PDF — malware analysis report

Static analysis result for SHA-256 361eaac3599f1430…

MALICIOUS

PDF

90.6 KB Created: 2020-12-28 20:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9a346284d40470159feca4e036794fe9 SHA-1: 7166d2acf8bce55f5f8db87d2e64a253aec743b7 SHA-256: 361eaac3599f14305d77e93c528398e56f56f9d9fe6d3d641618e5f46a96fdf9
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The heuristic firings indicate this PDF is designed to link to a large number of other PDFs, likely to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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=entropy+in+thermodynamics+pdf In PDF document text
    • https://cdn.sqhk.co/jipobuxaza/ehb3Ruq/bubble_bobble_nintendo_switch_release_date.pdfIn PDF document text
    • https://fivoputan.weebly.com/uploads/1/3/1/4/131408393/gedureboxabuxip-zukat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5fc1f0c5a45a5.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/dupijeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f96968ae0920.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sakitivezilike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_5fa02c15e736c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f909cb23c9cd.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/b621df59-b3e0-4642-ac86-5698eefd45e0/hbq_i7_tws_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f99c39-1fe7-49f8-9744-d80357c046a9/dicks_sporting_goods_treadmills.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_off00010c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C90 5424 bytes
SHA-256: ecd11a328b1b89e0ee89328f333c9d96b6a6811283e49a1d11c3be75c8640bbb
font_01_sfnt_off00011ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE1 11992 bytes
SHA-256: b539aaf43e75ece3a5da70b3875bf25df7a3b2a95e2c09865519a9fb8ee4482e
font_02_sfnt_off0001480e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480E 16192 bytes
SHA-256: 2fbb528c30fae61c70ff4082faa5fece981988df10abad1a91cab371b780b9de

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