Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f0f7e996fce22f…

MALICIOUS

PDF

78.4 KB Created: 2020-11-23 03:10:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 70782eb18362f451afbe02943e901f92 SHA-1: 1b6995366d5e41a4dcac1d3bc5d47bfc89f96529 SHA-256: 49f0f7e996fce22f7b4d9b50ea51f47527bd94a0316a1340a947b4e915110179
214 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm, indicating a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. Although no scripts were extracted, the presence of numerous embedded URLs, including one pointing to known malicious infrastructure, suggests the document's primary purpose is to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/123?utm_term=cit+in+the+world+merit+badge+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_5f9429e2441e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5fae67fcb993f.pdfIn PDF document text
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/sozonegewaruxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5f987e4f07dd8.pdfIn PDF document text
    • https://vifefafu.weebly.com/uploads/1/3/4/8/134876142/mogix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f87ee0134892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424011/normal_5faa68436cf39.pdfIn PDF document text
    • https://kevugekakizuxo.weebly.com/uploads/1/3/4/4/134481001/suvarewavubejakewezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8f43d44f2fc.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/tawovojo/76622151273.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_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 5376 bytes
SHA-256: 747417952c97725e66770ff099986101130e7990de7a363db38f1a575cd44f15
font_01_sfnt_off00010859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10859 10784 bytes
SHA-256: 5041fe994cfa1c43a83c3865abaf26c39dbab7ce25f3dd7983c70d95bed4edd1

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