Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0ab5cc5fdfe1a8…

MALICIOUS

PDF

58.9 KB Created: 2020-12-18 15:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1565039c5dd80c483c1ce46638c87262 SHA-1: 7f8bc23684f3305187e6b6bf1bc4ed34449a3bee SHA-256: 7c0ab5cc5fdfe1a85dee73a45dd9f48e89017a425f178c3d8bcc115b0dd2401b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to Weebly hosted PDFs, indicative of a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/aws?utm_term=inherently+instinctively+crossword+answer
    • https://vadanuburizupi.weebly.com/uploads/1/3/4/9/134901301/9471724.pdf
    • https://vavezumejut.weebly.com/uploads/1/3/4/6/134655991/9979906.pdf
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/texobo.pdf
    • https://rezolokad.weebly.com/uploads/1/3/4/7/134718373/jatafi.pdf
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/7cef794a.pdf
    • https://furedanoduribi.weebly.com/uploads/1/3/4/6/134681858/kuzitujameze-zibafazafere-turusafizow.pdf
    • https://kanoritixuvu.weebly.com/uploads/1/3/4/8/134874131/zetirekujive.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vasofirida/demonology_warlock_wotlk_pve_guide.pdf
    • https://s3.amazonaws.com/susopuzupure/17246952489.pdf
    • https://static1.squarespace.com/static/5fc0de27085bf90c0efce9ba/t/5fc15a8bfa04221c715261a2/1606507147123/bmw_328i_service_manual.pdf
    • https://s3.amazonaws.com/tobito/mojiledaripoxusejavi.pdf
    • https://static1.squarespace.com/static/5fbfff2111f6a4198480a438/t/5fc22b479d79364840d69eb5/1606560583539/stihl_leaf_blower_parts_diagram.pdf
    • https://s3.amazonaws.com/rivazixexuguri/blank_dnd_character_sheet.pdf
    • https://static1.squarespace.com/static/5fc0f2f6c89e1c4b8fbea157/t/5fc589c29d793648404b416f/1606781378546/call_of_duty_zombies_download_pc_unblocked.pdf
    • https://static1.squarespace.com/static/5fc566ac3dfdd95b60f3409b/t/5fcb879f11c29807e6da9ff3/1607174047385/ben_cook_newsies_king_of_new_york.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac79.bin
3ff255f98973edaf55691b79ba52db2d1e46c1caeec6b6a93649268264de0302		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC79 5220 bytes
font_01_sfnt_off0000be4b.bin
1daeedc1e6cae0ed6e0bc859c96070a68c87db3d6999b39293b0301c0b4ff87f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4B 9492 bytes

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