Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8bb680b2606fe9c…

MALICIOUS

PDF

71.9 KB Created: 2021-02-13 08:24:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b6f8ab208617a573c10d81b41f303247 SHA-1: b00ffbbe125495636181aa0e1787cfe3d8b77571 SHA-256: c8bb680b2606fe9c4a12a1eed131e2563d69c3b9e06a9904d1a5c2dcdd49ab48
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=monk+multiclass+guide+5e PDF link annotation
    • https://cdn.sqhk.co/nedupugifuka/icidhht/8928391295.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/ehcvjVy/zufulafawowesap.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/jicidxj/heads_soccer_copa_america_2016.pdfIn PDF document text
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/6312140.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/50200.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/juwiz_fejilepedunoba_baforanonu_benukuk.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/989d593.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/71532cf143.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/BcJheib/28161177606.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/8b5dc08c75719.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/hcHig0l/fezaboza.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/gY6ye16/mozoxasugimasemevo.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/hhgcxic/worajuso.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/ONii7ge/24151368485.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/FibKieX/sirona_dental_support.pdfIn PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/2843460.pdfIn PDF document text
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/7697048.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/jaSiexe/galaxy_striker_alien_shooter_hack_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogofijanititad.epizy.com/kcpe_2018_answers_and_questions.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_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 5356 bytes
SHA-256: 8b29d0001c58df674449421ed237643cdc744fd36141cea8f6104166c5139f55
font_01_sfnt_off0000ee59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE59 10540 bytes
SHA-256: a0a30b95eff4ac3e12aea56169722ab6090abb1e3cf25f26b759e15e62ca88a0

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