Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d11a9ae6c6482b…

MALICIOUS

PDF

101.7 KB Created: 2021-04-23 04:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7154c2895a401f05f0a54755022fbe80 SHA-1: 8a20ee1d2160746d93399faa218146e669491b46 SHA-256: c2d11a9ae6c6482b5e9958b86d057d853089d16ba4c2b09b2326885e1ec3af8a
186 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. 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 0.9997

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://dafemum.ru/strik?utm_term=roku+2500x+no+remote+or+wifi PDF link annotation
    • https://cdn.sqhk.co/rutesawir/VDPOjjh/mixuwiduvutafabaremido.pdfIn PDF document text
    • https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/3256515.pdfIn PDF document text
    • https://kobamaputoruv.weebly.com/uploads/1/3/1/4/131409310/03c052a73.pdfIn PDF document text
    • https://bogizironafek.weebly.com/uploads/1/3/1/4/131406395/digokof.pdfIn PDF document text
    • https://jidobatixinel.weebly.com/uploads/1/3/4/7/134726111/depivopav.pdfIn PDF document text
    • https://fuvepuzineg.weebly.com/uploads/1/3/4/4/134463404/somavel.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jjavibg/ironplanet_salvage_auction.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/ige5hiI/jemamerir.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/gFjcVTE/32241796524.pdfIn PDF document text
    • http://naderuromopuru.22web.org/nuevo_formato_cedula_de_identificacion_fiscal.pdfIn PDF document text
    • https://cdn.sqhk.co/dabeluza/8jhhhLK/brookstone_wireless_speaker_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gebefamudusefo.epizy.com/jimupulonulakemadatubi.pdfIn PDF document text
    • http://vuzabog.epizy.com/60598019954.pdfIn PDF document text
    • http://wubunulawu.rf.gd/87609757585.pdfIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_2eef7a863b95421285851439a892aa23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/55353086716.pdfIn PDF document text
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_803260dac8874844959c83c9c18d0465.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisedij/the_fall_of_jake_paul_song_clean.pdfIn PDF document text
    • http://fabomisibis.rf.gd/1745886207.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/types_of_anemia_and_treatment.pdfIn PDF document text
    • http://defixudopa.rf.gd/57494496661.pdfIn PDF document text
    • http://tozibuxadotoba.epizy.com/55136028463.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_off0001512b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1512B 5120 bytes
SHA-256: 987e59c7433bee4941ee7f1e0f6f171ed2f69aa82a0199ec19499a9bb90806fb
font_01_sfnt_off000162af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162AF 11572 bytes
SHA-256: 46abc4ec404f18ce99ebcfa68daf27f49c55d32986efc6b43fd1fa8786703688

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