Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ee446dd8fa2f83…

MALICIOUS

PDF

79.8 KB Created: 2021-03-30 00:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 730dedeaa8795bff399ba09fc63eac08 SHA-1: 27733195622d07f0ac29209b8e4ffea77646da15 SHA-256: 07ee446dd8fa2f83beec2bb925902c314dfb2bd2606cac702d144e24de4f7a85
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://resalured.ru/strik?utm_term=lexus+rx+350+price+canada+2019 PDF link annotation
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/gawap-momobijar.pdfIn PDF document text
    • http://ruwakus.22web.org/4082734078.pdfIn PDF document text
    • http://bio-ita.fun/fuxodavenzmob.pdfIn PDF document text
    • http://fojowufuzuno.22web.org/58818754563.pdfIn PDF document text
    • http://spoonnumberone.xyz/kalakekanolagabivudjr2b5.pdfIn PDF document text
    • http://akfb.online/how_to_replace_ge_profile_microwave_light_bulbxemwh.pdfIn PDF document text
    • http://womenit.space/the_first_law_of_thermodynamics_worksheet_answersopqa9.pdfIn PDF document text
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/kokerowadusozizi.pdfIn PDF document text
    • http://zalavsky.ru/43921177185155e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuwosil/92255806889.pdfIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_0b8bf7df76bf4ece9f7265f7d7a04129.pdf?index=trueIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_ff10753518974a0caa2b26fba5a5e4d6.pdf?index=trueIn PDF document text
    • http://totexamivemasal.epizy.com/oxford_phonics_world__1.pdfIn PDF document text
    • http://nobapizasiwe.myartsonline.com/wurimevaruremo.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/xowikutikorimalesutewal.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_c46f315a1aad4a10b843d46a1f18e4bc.pdf?index=trueIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/78295193462.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/quantum_circuit_simulator_apk.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_ab758a4f839c4504a11650d4fb9ee57f.pdf?index=trueIn PDF document text
    • http://nebabujomubup.rf.gd/find_audio_driver_for_my_pc.pdfIn PDF document text
    • http://pepuzigupa.epizy.com/nujonawe.pdfIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_172ba0ed90b04836873c490f845c5656.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/22299970757.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_off0000f80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 5812 bytes
SHA-256: a113db8e59a1960f2aaa91e3fd7a5f330765dcc07c0f81f88f37c36654b337dd
font_01_sfnt_off00010bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEA 11144 bytes
SHA-256: 69a410a6ecc7fc5a74426e65af0a45d6e4a1cad3d88e14485f03cff48241dc70