Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff95a1b05376384…

MALICIOUS

PDF

84.6 KB Created: 2021-05-13 22:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d71072355d367d120ac028c4ed8861a4 SHA-1: 995568b6d2a649fd98bfa34b455ca4fbd6dea2e5 SHA-256: dff95a1b05376384c7cf293515cbb42ad7102a8706c691e52e69751df1193135
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file exhibits characteristics of an advance-fee scam, employing a link farm to direct users to external resources. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates a lottery or parcel delivery scam. The numerous external links, many hosted on disposable domains, suggest an attempt to distribute malicious content or phish for information. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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
  • 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://ponafet.ru/strik?utm_term=strategic+brand+management+keller
    • https://cdn.sqhk.co/zofukumane/wePgeig/49463169122.pdf
    • http://golesaluwo.66ghz.com/buzarirerobenefexiraneb.pdf
    • https://nipoxumafoji.weebly.com/uploads/1/3/4/7/134717148/1718706.pdf
    • https://lirodenagegoket.weebly.com/uploads/1/3/1/4/131437677/7183453.pdf
    • http://buzevuzelape.mywebcommunity.org/79203791197.pdf
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/71db5b.pdf
    • https://sowikidorazeku.weebly.com/uploads/1/3/5/3/135306740/lijigiw.pdf
    • https://zivixitusinuz.weebly.com/uploads/1/3/1/3/131380786/2efd7def.pdf
    • https://zobilajes.weebly.com/uploads/1/3/2/6/132682335/metalepolumif.pdf
    • https://cdn.sqhk.co/nakijalufiw/bijghPv/85584261634.pdf
    • http://vumajuzatijerak.getenjoyment.net/hamilton_beach_soft_serve_ice_cream_maker_recipes.pdf
    • http://fopekoriw.sportsontheweb.net/gatazuvipuvikorelexu.pdf
    • https://cdn.sqhk.co/mekaxosur/0iaiahb/amazon_prime_video_subscription_cancel.pdf
    • https://cdn.sqhk.co/vilonunufuk/hcWihay/smash_mouth_lead_singer_covid.pdf
    • https://mujavipaw.weebly.com/uploads/1/3/0/8/130874121/nupinivo_vomawemelupina_lenod_wepof.pdf
    • http://sesaxojatox.iblogger.org/australia_visitor_visa_form.pdf
    • http://fapasevusiledap.mygamesonline.org/80731575155.pdf
    • https://cdn.sqhk.co/pojizurigos/BriighQ/19887101604.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_2ae7d3b3dab74198af25220a0fb7b2cf.pdf?index=true
    • http://kosezofejesuxef.atwebpages.com/sapubamujomefajeworufosi.pdf
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_71ee0a56d98248c398bed802d234843d.pdf?index=true
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_024e1b495bbb458788adf34dec33c7f6.pdf?index=true
    • http://fokelele.epizy.com/how_to_clean_the_dr_brown_sterilizer.pdf
    • http://kepatuzazavew.epizy.com/how_much_do_public_relations_get_paid.pdf
    • https://5de6e22f-064f-4859-b003-4eaa502c5056.filesusr.com/ugd/2609e6_4658883688c94230b6c49b037284d770.pdf?index=true
    • 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_off0000ffe5.bin
3fbb7d6d9d867a4ee10f984658416331130a2e716d5da2b567034f9e78ab01eb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 5068 bytes
font_01_sfnt_off000110f8.bin
04a6dbf45e159985f3e3705ed4963734009dafe764cc85e2c9e78d62e473b577
pdf-font-stream PDF embedded font (sfnt) at offset 0x110F8 11956 bytes
font_02_sfnt_off00013736.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13736 4324 bytes