Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ea86eb31a00ab8…

MALICIOUS

PDF

123.8 KB Created: 2021-03-12 19:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd6f1b2e59038751356540073337a038 SHA-1: 738a55e7021a24f67d34d97c255c5692845a36f6 SHA-256: 72ea86eb31a00ab818ae5238f452e79360e3f3394b6b293b0ee6967add76d6c8
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, with one specifically identified as a potential phishing lure related to 'gst product tax list pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. While no scripts were extracted, the high number of external links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/award?keyword=gst+product+tax+list+pdf
    • http://nopuvobetag.mygamesonline.org/55124141773.pdf
    • https://static.s123-cdn-static.com/uploads/4393349/normal_6002bdda1ba07.pdf
    • https://cdn.sqhk.co/baxikomo/hgRgej3/boxing_gloves_for_women.pdf
    • https://cdn.sqhk.co/sesijisova/gia5gdx/84277912526.pdf
    • http://likedizar.medianewsonline.com/50288030391.pdf
    • http://zuxekagapefe.mygamesonline.org/10725370422.pdf
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5fc773fd85f73.pdf
    • http://xiwakaravivomik.scienceontheweb.net/how_much_does_a_program_manager_make_at_amazon.pdf
    • https://cdn.sqhk.co/fubemabofof/hdjj8gf/82217859945.pdf
    • https://static.s123-cdn-static.com/uploads/4374689/normal_6005ca11b0acc.pdf
    • http://fetesitomer.mygamesonline.org/savinobugajalokozirixagim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lebaxa/bdo_alchemy_guide_2018.pdf
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_d92a163e814d46a390014c0edd14aa47.pdf?index=true
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_e43f64fe6c53489b8d3fdffb09c7016f.pdf?index=true
    • https://s3.amazonaws.com/wupagivoz/24877036870.pdf
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_30686bdc422047bf9eefcfdd76faa9ee.pdf?index=true
    • http://nejesezape.myartsonline.com/2011_ford_escape_owners_manual.pdf
    • https://s3.amazonaws.com/gawabog/jobalorabiwotutetubu.pdf
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_0aac141f785e4abb8eccf90d7f7e1116.pdf?index=true
    • http://rojanesifilagu.myartsonline.com/artificial_intelligence_a_modern_approach_2nd_edition_solution_manual.pdf
    • https://s3.amazonaws.com/jexijer/birthday_cake_with_name_editor_free.pdf
    • http://bifovigavij.myartsonline.com/mockingjay_part_2_release_date.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_off0001a8d9.bin
80e8f2f48bd04122ff1ae19dc099daf35e04d26d9281604f316990a9078d44dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8D9 5248 bytes
font_01_sfnt_off0001bace.bin
36775c024b9c06bded9ebdce2915a765c7677775ec6dc215e4750d5ba230c5e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BACE 11360 bytes

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