Malicious PDF — malware analysis report

Static analysis result for SHA-256 0310e49a86c6f165…

MALICIOUS

PDF

103.6 KB Created: 2021-03-23 22:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 848c610c3383e98268e9c04fbdac0030 SHA-1: 1e709eebdc0ac3c1631e9c1d9e038c04f1e1c30a SHA-256: 0310e49a86c6f1658528e24dc2fd6205b2d8a783030f8b5e28e1558fc9d7b835
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, indicating a link farm designed to direct users to potentially malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=the+city+of+heavenly+fire+summary PDF link annotation
    • https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/dovafapopofu.pdfIn PDF document text
    • https://nokifafib.weebly.com/uploads/1/3/4/5/134597692/2842804.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/jhggrbj/6750088247.pdfIn PDF document text
    • https://fokutape.weebly.com/uploads/1/3/2/8/132814024/6438762.pdfIn PDF document text
    • http://raraveluwogevuw.mypressonline.com/bittersweet_miranda_beverly_whittemore.pdfIn PDF document text
    • https://cdn.sqhk.co/wokowuvawuz/hgPTbjd/mitolokumawexugilafesov.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/vvie92L/marketplace_foods_minot_nd_north_hill.pdfIn PDF document text
    • http://benilobodereji.mygamesonline.org/1997_yamaha_timberwolf_250_owners_manual.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/what_is_in_the_norton_anthology_of_english_literature.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/womipeguwomow.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/jBNeweh/mirori.pdfIn PDF document text
    • https://zidimegaga.weebly.com/uploads/1/3/0/9/130969389/8070798.pdfIn PDF document text
    • https://vutajavegev.weebly.com/uploads/1/3/4/0/134040502/nutaxogej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_1560e88d92b7461394be5bff851c4f20.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_dc386dfac39a47e6bffe8fa51c355422.pdf?index=trueIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_4170de6a51f24a779aef7798514bea5c.pdf?index=trueIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_c8229e4265ca492eacfe1b1f32079045.pdf?index=trueIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_ed71c28e34e24058975a1774d0958356.pdf?index=trueIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_5624ca7f18ff43fc85f3340a27869be3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/doctor_zhivago_2002_full_movie_in_english.pdfIn PDF document text
    • https://c11ab09e-384c-4904-8c79-5ef6f38008df.filesusr.com/ugd/7131a6_ee28ec635dd8495f9a5eccd12ba8b430.pdf?index=trueIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_e9b2029998b74caa836471f427ad5e4d.pdf?index=trueIn PDF document text
    • https://3d73ec66-e24e-4607-99a5-aa3c333c10ea.filesusr.com/ugd/a96454_d8c309dae2194a75b90ccc8fc1a60422.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/bloons_td_6_apk_aptoide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AF2 5232 bytes
SHA-256: 8fc80f6060e4ae27b0cc37963143d8a62a91a518659349ca8e4a1f1dc35b83b9
font_01_sfnt_off00016cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CAB 10584 bytes
SHA-256: 55f30b9340a73ac8e87ff740196cdce5b7e242f483ede39c7a3b1e3b1bb4564d

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