Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbb6a073d6797fa…

MALICIOUS

PDF

144.3 KB Created: 2021-03-14 10:21:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b87c725e5aa225acbd245ec4d5ed320e SHA-1: dcaa7f6a970461ad0c1c43834a0ea9517fdf17c4 SHA-256: fdbb6a073d6797fa230fa2f3d61a55ebba26c085c585e116d6a54453946981d0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many hosted on disposable domains, strongly suggests a link farm or phishing lure. The ML classifier also indicated a high probability of maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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.
  • 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/wix?keyword=legend+maker+booster+pack PDF link annotation
    • https://zaluzukefajol.weebly.com/uploads/1/3/5/4/135400247/3629132.pdfIn PDF document text
    • http://mobafemuparefe.iblogger.org/guidestone_financial_resources_aum.pdfIn PDF document text
    • http://imedo.ru/metal_gear_solid_3_remake_gameplaytaa51.pdfIn PDF document text
    • http://gofevim.iblogger.org/how_much_does_obamacare_cost_taxpayers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374535/normal_6002c4c1bbc58.pdfIn PDF document text
    • http://xokewekababawa.22web.org/ron_paulk_workbench_table_saw.pdfIn PDF document text
    • https://kanumipiga.weebly.com/uploads/1/3/5/3/135346224/352df2b0e9a9d9.pdfIn PDF document text
    • https://cdn.sqhk.co/rabovafom/hfigdli/zuwix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496013/normal_5fdbe8f151c09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406455/normal_5ff493837aa36.pdfIn PDF document text
    • http://kersita.space/why_barcode_cannot_be_readb5as4.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/zjhthee/word_trip_apple.pdfIn PDF document text
    • https://pibezenasa.weebly.com/uploads/1/3/1/4/131454503/wixupubufi_dizesewar.pdfIn PDF document text
    • http://sandiego-podcasts.com/vector_mechanics_for_engineers_dynamics_solutionsaf11d.pdfIn PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/buratafesaja-luvogoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/ha9giHe/35486667070.pdfIn PDF document text
    • https://fudanologakobur.weebly.com/uploads/1/3/5/3/135394175/zetenerokuxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467007/normal_6001802c5727c.pdfIn PDF document text
    • http://virubedasiv.22web.org/textbook_of_medical_surgical_nursing_14th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/ghrXs0P/15432006090.pdfIn PDF document text
    • http://front-glass.website/phonetic_table_englishse262.pdfIn PDF document text
    • http://zuragaretezi.iblogger.org/zojar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/659c20b6-940d-40fd-b0d0-d8f178ddfc18/princeton_university_map_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391a34d5-3848-40bd-9b6a-c5c58a983646/77536361101.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEBF 5508 bytes
SHA-256: 90073208cd4462a4d0e15f7456806d916c6d93a0258f0d29b3796b1819105a1b
font_01_sfnt_off0002015a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2015A 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000209e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x209E8 11720 bytes
SHA-256: 98d44443776abe544ab5b8e568587505e0abb6977a38a3932cb2023a58375e29