Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c97b45d7b24aa2…

MALICIOUS

PDF

74.9 KB Created: 2021-03-19 13:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 802b735cfc9aeb4b4cc7711e678ea6f2 SHA-1: 20a3ee3ceb6d47d9e05059543835f49614ee7fd0 SHA-256: b7c97b45d7b24aa259682e90ac57f477e1ff69fb99b8fa8d5ce4d174fde8f98e
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, suggests a lure related to a 'Craftsman weed eater manual'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=craftsman+weed+eater+27cc+manual
    • https://static.s123-cdn-static.com/uploads/4420244/normal_5ff779e14ab12.pdf
    • http://latencfsrt.space/duduvapojiwabogufebibaloletusl.pdf
    • http://sesulede.iblogger.org/how_to_do_mental_multiplication_quickly.pdf
    • http://buloshnaya.site/7639720346s41tc.pdf
    • https://cdn.sqhk.co/mozulunilex/xxjegc6/latemiwax.pdf
    • https://cdn.sqhk.co/rubuxupab/ie0GMc0/82309574791.pdf
    • http://honbiz.pro/how_often_to_drain_water_from_portable_air_conditioneruft77.pdf
    • http://indir-kazan.com/citroen_c4_cactus_infotainment_manuallaka2.pdf
    • https://cdn-cms.f-static.net/uploads/4445726/normal_604e80741de71.pdf
    • https://cdn-cms.f-static.net/uploads/4425908/normal_6053a6f2e635c.pdf
    • http://nejozewowedona.22web.org/nujites.pdf
    • https://static.s123-cdn-static.com/uploads/4484997/normal_5ff4eb4ecb8df.pdf
    • https://cdn-cms.f-static.net/uploads/4379744/normal_600f9ebd08300.pdf
    • https://cdn.sqhk.co/xezalagefog/QdHFheD/53514336193.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_16417c5e87a2458db36d84b50ddd7c8d.pdf?index=true
    • http://zixaxonenugoko.epizy.com/noida_metro_admit_card_2019.pdf
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_17b1993f34cf4e1da10b7e1dadd0316e.pdf?index=true
    • http://tapanowi.epizy.com/base_de_dados_2.pdf
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_323e0d6a2d2742998ef65c2a7643226d.pdf?index=true
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_1e2a66f330004dc18ca821b69a5e0115.pdf?index=true
    • http://sexofademuga.rf.gd/1997_ford_7.3_diesel_fuel_system_diagram.pdf
    • http://godolefimew.epizy.com/mississauga_police_accident_reporting_centre.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_off0000d2f5.bin
d4a80e9b4ccca5aa0b1887523609b6df741e4fba2ec06becf25f789b67f5ff44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F5 5220 bytes
font_01_sfnt_off0000e4b5.bin
a7bdbfbd95a17b03505aea5d533e346af94890d776ce4c3b2ca1b9f497d0f1d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B5 13460 bytes
font_02_sfnt_off00010fe9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE9 4324 bytes

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