Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d59f7bee88d896…

MALICIOUS

PDF

75.9 KB Created: 2021-03-29 16:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0113f05c1dd12e6a5add34daff0b072b SHA-1: df5c78e9915b89377bb1c7be89e50e60c94820c3 SHA-256: 07d59f7bee88d89608a1d582d5cab11467ffab92c981d81a691eea17508ac340
126 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs suggests an attempt to redirect users to potentially malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://resalured.ru/wix?keyword=gw2+hp+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485689/normal_600e729d4390f.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/4097494.pdfIn PDF document text
    • http://ro-shop.space/3613948496undbh.pdfIn PDF document text
    • https://zebewanuvaxa.weebly.com/uploads/1/3/4/6/134613040/4005921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_600c99f6c0cbb.pdfIn PDF document text
    • http://tryporte.xyz/is_the_new_living_bible_a_translation_or_a_paraphraserypkv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528876/normal_6033ef5fd3a6a.pdfIn PDF document text
    • http://onlinekartiadesi.com/55182233361ienhm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_6050d811193fd.pdfIn PDF document text
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/tudizupasetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_600cb617c768a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_60134b083cd96.pdfIn PDF document text
    • https://berajodisi.weebly.com/uploads/1/3/4/6/134651265/b6da9e4669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374698/normal_5ffa855a64b37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481552/normal_5fecd1b432780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_6047a87d1927d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450036/normal_60096a155e0b0.pdfIn PDF document text
    • https://xiduzejeg.weebly.com/uploads/1/3/1/6/131606953/povivogabaziti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_6054936133be7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_6015017ca1bb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_600ed8d14c0ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457572/normal_5ff6749165be7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB95 4960 bytes
SHA-256: 175da178ad2dda94cc9962cdedaf72f14983ab29ba53ee5d40c9f91c4c6c61bd
font_01_sfnt_off0000fc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 11076 bytes
SHA-256: 3271e14280fd5c41537c07ed4a949a50fce7616e16b00cb0398dec343600e96a

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