Malicious PDF — malware analysis report

Static analysis result for SHA-256 d905e190070638c9…

MALICIOUS

PDF

82.7 KB Created: 2021-03-29 02:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 001d0d5c6cd60bdc3a9b9eb2a6f5cb51 SHA-1: 15464694f35b10cafa3ac2594196167525273e29 SHA-256: d905e190070638c98728b5b26fc89d45784e3f34c55b8c49401890d1db158ff0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=toy+barn+patterns+woodworking+plans
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/1209970.pdf
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/vozubaviv-mogotezil.pdf
    • https://cdn.sqhk.co/sitopizol/UgfSyx8/cinemark_theaters_stock.pdf
    • https://defavelusanopef.weebly.com/uploads/1/3/5/3/135345674/goduful.pdf
    • https://cdn.sqhk.co/xufaribo/eS9hiic/color_by_number_halloween.pdf
    • https://gerulelib.weebly.com/uploads/1/3/0/9/130969354/b18bf64841948c9.pdf
    • http://fobativ.mywebcommunity.org/75997259621.pdf
    • https://jodaxirijiv.weebly.com/uploads/1/3/0/7/130776114/tevufegugiv.pdf
    • https://cdn.sqhk.co/towevefizub/Owjby0v/kemufuwunodudutakezevawur.pdf
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/kezelupedixi-wulejuwigijela-zamatakivofe.pdf
    • https://vukosigubew.weebly.com/uploads/1/3/4/8/134860762/4195668.pdf
    • https://cdn.sqhk.co/koxopumo/Ogh5gdT/to_do_list_application_free.pdf
    • http://fejukoturig.medianewsonline.com/26075190256.pdf
    • http://alkim.xyz/sukadujazi7fe3i.pdf
    • http://straponartist.com/33216002596nd4f3.pdf
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/9a843eeeef0e4b4.pdf
    • http://ayazshabutdinov.club/kijovuzipeba1it8u.pdf
    • https://cdn.sqhk.co/datolabevev/iWigdxH/krome_studios_kickstarter.pdf
    • https://mogefitinovodug.weebly.com/uploads/1/3/0/9/130969954/juralufov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fofeguj/canon_580ex_ii_flash_used.pdf
    • https://s3.amazonaws.com/jafujasiwetid/a_raisin_in_the_sun_unit_exam.pdf
    • http://reladefuxuna.onlinewebshop.net/chili_pepper_madness.pdf
    • https://s3.amazonaws.com/tapexiw/graphing_quadratic_functions_factored_form_worksheet_2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c9.bin
020cd5b3d42efa030920fe47cb176f64dd01014b24294ae20c0d29a99d938f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C9 5260 bytes
font_01_sfnt_off000107ca.bin
5c68808a76f0012abd15fa46a033918e56ef45d1c7347caeee89f49fb2124a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107CA 11524 bytes
font_02_sfnt_off00012f3e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3E 4324 bytes

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