Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d35c1f45e48b86…

MALICIOUS

PDF

80.9 KB Created: 2021-04-03 03:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 882f603c48f0da211800e9cd8303b2a5 SHA-1: b169059eeb4d0ee81b1fc3b90e3efeafd2d49c90 SHA-256: f2d35c1f45e48b861dd994bbd53318037ce9c1cc666bb13bb5a3ebd873bd084a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://lozipotod.ru/wix?keyword=manual+rpg+maker+mv+espa%25C3%25B1ol+pdf PDF link annotation
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/aacc8053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451544/normal_603fd4a4ee255.pdfIn PDF document text
    • https://gugajonegil.weebly.com/uploads/1/3/0/8/130813642/38704d.pdfIn PDF document text
    • http://tersq.space/german_word_family_dictionaryql9j0.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/gjVXtjj/9855401792.pdfIn PDF document text
    • https://cdn.sqhk.co/gigemuji/eqMiaje/58005217081.pdfIn PDF document text
    • https://tepaxomiro.weebly.com/uploads/1/3/6/0/136019937/8b4d4906922083.pdfIn PDF document text
    • http://bnatural.space/lenovo_y50_specsu91n4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469103/normal_5fc9e78fcf59e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5fc607067d9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_6035c830956f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_6013a21d17fef.pdfIn PDF document text
    • https://fotaluxig.weebly.com/uploads/1/3/5/9/135973299/gidabajaruturafuvij.pdfIn PDF document text
    • https://nakigere.weebly.com/uploads/1/3/4/6/134608851/wozebirav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_52c9daefa79649f79b40c192897c2285.pdf?index=trueIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_af2fc29d8acf4190876b05fc908c27b5.pdf?index=trueIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_2f1787358f3d4923b464d13f4e1508d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/4568647107.pdfIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_f1ee292f65ca4188b7c53471c48bb24f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/78036088645.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_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 5704 bytes
SHA-256: 4798ee5a8aeed506237d77158060c7b4cec0503ab3cbfd9da06ade3b87615f8b
font_01_sfnt_off00010b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B85 12616 bytes
SHA-256: 383cc3136697fcab91eec2a08468510cdc3e37ed7ccc810c557e05995749fb86

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