Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7ad9fb6e3453d8…

MALICIOUS

PDF

66.1 KB Created: 2020-12-05 20:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ea8ddc41f32d3108955ceffe0ad100bc SHA-1: bf8bacce126bc58d21f32749db2f735cefdd25e7 SHA-256: 1f7ad9fb6e3453d89736bb962084b84cb9dde0749d34d380ef764d145c3c65d9
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links designed to redirect users to external websites, including a known malicious redirector. The heuristic firings indicate a malicious redirector link and a PDF link farm, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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/123?utm_term=newair+portable+ice+maker+cleaning In PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/9251944.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/d99a343b67627d.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/litamagul.pdfIn PDF document text
    • https://xeluwase.weebly.com/uploads/1/3/4/8/134850208/1d214895881.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc19b3af7cf8c75402fef45/t/5fc62d443f75b16643a6c08a/1606823237044/28279752855.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6757de5c7695ca9c1adce/t/5fc9152ce23d782f78d312ea/1607013679983/xoxomakomedimige.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54b7b12facd59ceca0564/t/5fcb696085bc3a28a60a1265/1607166304544/felijoliwozupifiburer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5072ec14dfd36fe0c117c/t/5fc8649ce101942bf76f8d67/1606968477154/6714399879.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ec955687f52b6b8145c1/t/5fc16ec81972c46e3cd4eb71/1606512328280/xejetob.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_off0000c8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EB 5340 bytes
SHA-256: 74293d6fdba28d831666cea9bba8536e3d5b687749fc6e5b47908d837d6c9362
font_01_sfnt_off0000db1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1B 9740 bytes
SHA-256: 88b4559fac7cfb900e9416b3c80a9ccbf508fda37dc601e062857edcd8428f23

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