Malicious PDF — malware analysis report

Static analysis result for SHA-256 30877fcf1d203ba8…

MALICIOUS

PDF

91.6 KB Created: 2021-01-04 19:35:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3b453dcc23fc0d0e6102802c87ec21b6 SHA-1: 7945d477ab17e6c40799b018c8554f634c9b2bfa SHA-256: 30877fcf1d203ba8f4dfca298f660242a5b0b6eddaa0223c1b8c2f5ea5f49c81
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to known malicious redirector infrastructure (ggtraff.ru), suggests a phishing or content-distribution scheme. The document body is heavily obfuscated and unreadable, but the heuristic firings strongly indicate a malicious redirector and a link farm, likely used to distribute further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=ffxi+clothcraft+guide+2018 In PDF document text
    • https://kogezuzoxato.weebly.com/uploads/1/3/1/0/131070880/nexifip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_5fa61c163fcd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f8d4acdaaeab.pdfIn PDF document text
    • https://vekeliludodim.weebly.com/uploads/1/3/4/7/134745250/6184171.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/739a1b9fc5bd7.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/xofaxorofem_lojino_welaz_zotus.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/1bc0d832-5b56-4d1a-9b96-dba92109429f/31682046062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce0df9c-5ff3-4218-b803-411743371479/44374281918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5639b8e9-2fa3-4249-b171-db0a8a2ddbf5/bizulumovokifofegedotizu.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/98421460270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce95209-b901-4c8e-bd2d-bf0c8d129ef9/rabikonujamilijeruvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c73511-be35-4f2a-ac40-97d61d14fd59/90515317208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5e9e8b-aa0b-4018-b231-45ef303bc4e5/rubabopalumaro.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_off00012777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12777 5648 bytes
SHA-256: 5cc2f64c7f5d21c332c92a7e5e0857d2f02f333b26e6e651ed6465230e73fd4b
font_01_sfnt_off00013ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB9 11528 bytes
SHA-256: fe5350cacb23a6980870c2ea43c52ec1574bfbac66fcafadb0e1bacdd6e1d8cf

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