Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ff106ec7b64f59…

MALICIOUS

PDF

81.2 KB Created: 2020-12-28 20:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 33a2240a7b6ec97095f68b30e49d35cd SHA-1: e64097b54a1eaa8abece6c019873215e5b72d321 SHA-256: 14ff106ec7b64f5928830561421b04ea8e0d4373df7f57c0a340d4489e4ebdc7
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. One critical heuristic identified a link to known malicious redirector infrastructure, and another identified a PDF link farm. The document body, though heavily obfuscated, appears to be a lure related to 'Giant desert centipede location', likely a keyword stuffing attempt to improve search engine ranking for malicious content. The presence of numerous external PDF links suggests an attempt to drive traffic to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=giant+desert+centipede+location In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f86f5a413a3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_5f9264019c1d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f96291798995.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/iejfjhr/sajomimivosatete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489740/normal_5fbe07bce79c6.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.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/fenatagazise/gift_voucher_template_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/background_color_code_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d93e8d-e61f-4163-99d8-8525eb8846ef/rapivipibadupepowodu.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/forigobujanaselis.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/nogirovose.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_off0000f288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF288 4884 bytes
SHA-256: 3bf92509e4002ac01154e5fd5b59ffb6bda042f84398ab1e2ee04a9fec59ef12
font_01_sfnt_off00010329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 11656 bytes
SHA-256: 0e05f79d5e59a8d52b73ee530aa851d62149870814b0c66b6b333d513684292e
font_02_sfnt_off000129e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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