Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f920b81f140842c…

MALICIOUS

PDF

68.9 KB Created: 2021-02-20 12:28:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 95c35cd7e7c6873e391d8946061f3ce2 SHA-1: 34b045ca8def829a6ce9fe375ab11642512ea296 SHA-256: 0f920b81f140842cbb9db34994005e706e14a6d91b3c1a953acb4f3b215648e1
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wix?keyword=bloons+td+6+apk+1.6.0 In PDF document text
    • https://cdn.sqhk.co/texivewa/jhjhfhg/ates_ve_su_2015_oyun_45.pdfIn PDF document text
    • https://terovudomam.weebly.com/uploads/1/3/1/4/131406893/76414b6.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/tP5LUjd/history_of_western_art_book.pdfIn PDF document text
    • https://kiretadipul.weebly.com/uploads/1/3/4/0/134040802/wamugibizavax-nonizolakikixe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487618/normal_5fe94c0581234.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/dhfji4g/42458649429.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/4413c8e83aa3c.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/gghaaii/word_document_header_link_to_previous_greyed_out.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492593/normal_5ffcb211c544f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5fce226f31631.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480905/normal_5fcead09e6ca6.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/4371386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455684/normal_60175cae8e814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478927/normal_5fd70e7e5fa92.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/jagux/xoseponotuvavuweno.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/38502814334.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/31181725696.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/35774344106.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_off0000d397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD397 5352 bytes
SHA-256: e8e476d28593aceefaeb90fcb0e72edb78b49ad3922675655cc936284561c45a
font_01_sfnt_off0000e5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 9576 bytes
SHA-256: ca7a967a6e2baa60ccefb70843ea1de51a576a274f78ca24201dbb88eb9df19b

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