Malicious PDF — malware analysis report

Static analysis result for SHA-256 4400ab7f0336468d…

MALICIOUS

PDF

113.9 KB Created: 2021-03-12 18:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7d53ee148ea5c24d8aa2328a2de4eb5 SHA-1: e7301483fdf580ab9829016bc8897505d604f839 SHA-256: 4400ab7f0336468dae928e06324cfcc948a9e8ed90d11148621483ee6dba2a8d
166 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, aiming to trick users into believing they have won a lottery or prize that requires a payment for delivery. The presence of numerous external URIs, including one pointing to a suspicious domain (`gimoguvi.ru`), suggests an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://gimoguvi.ru/123?utm_term=jinja2+load+template+python
    • https://static.s123-cdn-static.com/uploads/4487903/normal_5ffa90c2c610b.pdf
    • https://static.s123-cdn-static.com/uploads/4375891/normal_5fdecd05e7ae8.pdf
    • http://zovolexune.sportsontheweb.net/associativismo_e_cooperativismo.pdf
    • http://dalosizofovabes.medianewsonline.com/95262654873.pdf
    • https://cdn.sqhk.co/mudinaxape/A8jbdjq/77551038974.pdf
    • https://cdn.sqhk.co/mewuwemiromi/cjaThbC/48131723462.pdf
    • https://cdn.sqhk.co/bitomasijelo/fDIZvif/dijudabogalupuzo.pdf
    • http://mewudaguzexo.sportsontheweb.net/keto_diet_plan_for_beginners_recipes.pdf
    • https://cdn-cms.f-static.net/uploads/4489834/normal_60385671d7f1c.pdf
    • http://itactical.xyz/how_did_colonialism_affect_kenya_dbq_answersch1mo.pdf
    • http://lowufadit.scienceontheweb.net/woviretofokenipetux.pdf
    • https://cdn-cms.f-static.net/uploads/4455659/normal_603eaa434bad7.pdf
    • http://idealica-official-it.website/how_to_use_ge_profile_advantium_120dhm6b.pdf
    • http://vaxisezawoged.scienceontheweb.net/game_of_thrones_head_of_the_dragons.pdf
    • http://hookup754.fun/physics_formulas_for_neet_2020_download7tkgm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f117692e-e9e2-4fb4-818f-587ed653089d/management_theories_definition.pdf
    • http://jusopetikikij.onlinewebshop.net/7224005316.pdf
    • http://muvemaxadal.onlinewebshop.net/chlorhexidine_gluconate_msds.pdf
    • https://uploads.strikinglycdn.com/files/1d92196c-1fcc-49bc-973b-64e302f533d4/95209499367.pdf
    • https://uploads.strikinglycdn.com/files/2b19b58a-0d18-405e-b891-88753293ede8/92923437446.pdf
    • https://uploads.strikinglycdn.com/files/8af47911-551a-46fb-91aa-16314cecb746/39489597926.pdf
    • https://uploads.strikinglycdn.com/files/44f56dbc-3edc-403f-9262-2aea2bfecabb/12481545245.pdf
    • http://zegiwewezenaro.myartsonline.com/sony_vegas_pro_16_tutorial.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_off00017130.bin
9b25c0b79718aee92bc606c0b544ab0046f44df564483e05ebf2648d4a3f18d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17130 5012 bytes
font_01_sfnt_off00018217.bin
5a5fdce6dd379986bc58d6f72418ec4653c8b9ca2b838bc1b583c66c5c6c1683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18217 12444 bytes
font_02_sfnt_off0001abd3.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABD3 4324 bytes

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