Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3df03031f3b508…

MALICIOUS

PDF

75.4 KB Created: 2021-02-28 07:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f912f8810dcffc4f339235d54801d9ae SHA-1: 2da398856d0597051a52be80a7deb1b25a4ac756 SHA-256: 4d3df03031f3b508bcfa9ee04ed076a1613475b15ba10790b1b37b9aa9fdfa6b
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malicious content lure, indicated by the presence of a large number of external links, many of which are SEO-optimized. The primary URL, 'https://golowaki.ru/wix?keyword=guide+subway+surfers+hack', suggests a deceptive attempt to attract users interested in game hacks. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://golowaki.ru/wix?keyword=guide+subway+surfers+hack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5fe777d90ea59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_601273c902367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475999/normal_602cfb91760cf.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/Paijgc8/simba_run_condos_vail_colorado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_5fd83cf7002ec.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/2260335.pdfIn PDF document text
    • https://sibemawiwojaro.weebly.com/uploads/1/3/4/8/134887292/33275d02c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409256/normal_5fd2e431a2aa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_600532f2e9b67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_603363de7b8d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369657/normal_6005faf8b4fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_6017b9d653242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_601a493995a6e.pdfIn PDF document text
    • https://segoluremu.weebly.com/uploads/1/3/2/7/132740478/wazanexu.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/juduk/duplicitous_information_synonym.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_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 5504 bytes
SHA-256: d9e7299358c42e1df8e637f6284bc00312890c1a1f7940c98378c17f2e0fef28
font_01_sfnt_off0000fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 10184 bytes
SHA-256: b7d8cdbf27cc49c8aa161390ecd75d17c048c6fc053478fa2243a3161b725b9b

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