Malicious PDF — malware analysis report

Static analysis result for SHA-256 67251d0e9d9df55d…

MALICIOUS

PDF

94.7 KB Created: 2021-04-12 02:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0776638483ff2d79a74a5470bafad283 SHA-1: 80888810b63d50e7a748f1f2f83b9b08b466fdac SHA-256: 67251d0e9d9df55dd68eae5ec6c2d8e22e87858088867ebe10fb17ed9614220e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The primary URL `https://baarspo.ru/strik?utm_term=king+james+bible+with+apocrypha+app` indicates a lure related to a Bible app. ClamAV and ML heuristics confirm the malicious nature of the PDF, classifying it as a phishing or trojan delivery mechanism. No scripts were extracted, but the structure strongly suggests the PDF's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://baarspo.ru/strik?utm_term=king+james+bible+with+apocrypha+app PDF link annotation
    • http://nogurufegu.mygamesonline.org/calcined_petroleum_coke_manufacturing_process.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/jlhgsif/advanced_system_optimizer_3._5_full_crack.pdfIn PDF document text
    • https://milafesubori.weebly.com/uploads/1/3/4/7/134745217/xomupodizi.pdfIn PDF document text
    • http://creditreportus.info/mavigokolamogejugakni7u.pdfIn PDF document text
    • http://milanbeach.fun/kajadapewobogivabijepatub9lwt.pdfIn PDF document text
    • https://xatuguje.weebly.com/uploads/1/3/1/8/131856293/kigaguga-misenako-fizarifimikiw-zuzanunokitifid.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/fugovunuga.pdfIn PDF document text
    • https://cdn.sqhk.co/tumitibira/jihhVje/love_letters_in_the_sand.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/wukepaxumubugaka.pdfIn PDF document text
    • https://cdn.sqhk.co/jizesusaxeta/jgi6pm6/barcelona_events_28th_september.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zukomakiduw.myartsonline.com/44914942298.pdfIn PDF document text
    • http://xonolori.atwebpages.com/32744766069.pdfIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_2ecda405b2ee41f2ba6e0a39bf7b93b4.pdf?index=trueIn PDF document text
    • http://wepesubotivirel.epizy.com/98285209774.pdfIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_bd805bd3e2c54cdc84c81cc8bf4c2b70.pdf?index=trueIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_00815ea8fd50446b806db33f2ad85ef0.pdf?index=trueIn PDF document text
    • http://xivobipitu.epizy.com/occupational_therapy_definition.pdfIn PDF document text
    • http://zudobuzediret.rf.gd/sunbeam_oskar_mini_food_processor_lc3200.pdfIn PDF document text
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_285607bf7afc42dcae5157a0fd07ce65.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 4472 bytes
SHA-256: 7179d76514973e04e5bbebdb9c1dc2e4d18e3f647e370a5ae2758f9b5100607b
font_01_sfnt_off00010c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C27 5512 bytes
SHA-256: 5636927ec93a20856034aa5e5c964a04de76c0777da06dedff9ed6c4deb9aa64
font_02_sfnt_off00011ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC6 11984 bytes
SHA-256: d5a03dcc445eb538c16522170d292247080b1d398c5259cde44b27ea39001c72
font_03_sfnt_off00014736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14736 16728 bytes
SHA-256: f4525c978dc6c6b0a49bc4f8d25d5a0fe29cc6801e9eb7fb207a2156df5a1c5f
font_04_sfnt_off00015e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E53 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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