Malicious PDF — malware analysis report

Static analysis result for SHA-256 124730fe724c5f78…

MALICIOUS

PDF

68.3 KB Created: 2020-11-13 01:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c6d4b70a9dd4f84fb5256c8c32fdd98 SHA-1: 16dbc0b15c4beef3d498072eac9ca5d9e0ad0844 SHA-256: 124730fe724c5f78265ebc20170092dd1b0944d7684cfb64f29ccab65aca5c1f
96 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, with the primary URL pointing to a domain associated with SEO spam. The document body, though truncated, suggests a lure related to a video game issue, likely intended to drive traffic to the linked malicious site. No scripts were extracted, but the presence of numerous external links indicates a potential redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffking.ru/strik?utm_term=borderlands+2+not+launching+windows+10
    • https://vadekelovade.weebly.com/uploads/1/3/4/3/134372386/lekafajejefop.pdf
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/d28701f.pdf
    • https://xomowapiwaliv.weebly.com/uploads/1/3/4/0/134000086/9619329.pdf
    • https://nibobesexetew.weebly.com/uploads/1/3/4/2/134266191/nuwupedowe.pdf
    • https://jisasulozif.weebly.com/uploads/1/3/4/3/134371627/lokerozijesi_wuzegevuf_kezabinotovugof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/libusamagowuvo/avast_antivirus_free_one_year_validity.pdf
    • https://uploads.strikinglycdn.com/files/b0a87d1b-fc87-4a54-a962-94296e0264f1/67142818145.pdf
    • https://uploads.strikinglycdn.com/files/0667ed3d-bfbe-40d1-b902-c441ac1d918a/67831594044.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/revoponatokiwopuxodujoku.pdf
    • https://s3.amazonaws.com/boduxatavepe/97023312928.pdf
    • https://s3.amazonaws.com/ratixifo/rulaxukemomajasene.pdf
    • https://uploads.strikinglycdn.com/files/d9f6c40a-8fd5-470c-af5d-5c9d786cce5c/astrophysics_for_people_in_a_hurry_e.pdf
    • https://uploads.strikinglycdn.com/files/589b0d2e-2145-4de3-b620-3d69f38c3705/utorrent_free_for_windows_10_softonic.pdf
    • https://s3.amazonaws.com/vososasoxumete/laxivajakov.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_off0000cb6f.bin
58a720f9c1fce1b5ffdaea9bf162e0b2e00877bacddbedf4cb16fdb4fb0857e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6F 5668 bytes
font_01_sfnt_off0000dec9.bin
dc3a41ee67d7d9300d1dafe810de3bc804b7404b6896f1d57339d21821d254b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 10832 bytes