Malicious PDF — malware analysis report

Static analysis result for SHA-256 010ae1a59568f31a…

MALICIOUS

PDF

75.8 KB Created: 2021-10-02 04:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8fb77d7368792f63492f0870b68f86a0 SHA-1: 939dc43974615db63704db8ccf2518eb177a2ff8 SHA-256: 010ae1a59568f31a351dd0449e053123470648358d884d3693d1d93faa598061
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to suspicious domains, and is identified as a link farm on disposable hosting. The file's structure and the presence of multiple external links suggest it is designed to redirect users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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 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://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/81574208072.pdf In PDF document text
    • http://saringkarnwood.com/UserFiles/file/82873570673.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/23398627050.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/46249609494.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/63139498671.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/sobotulijoxavezogi.pdfIn PDF document text
    • http://grasslandtj.com/upload/files/91813971289.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/xirorowetuzig.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/70073734012.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1615709cc4b764---60184497368.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/dinumewirewaguvadadusiloj.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/nelegexijujedosumiwuxeda.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/98724795628.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/tusepekilimoxanapo.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/14311118659.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/38703190010.pdfIn PDF document text
    • http://springgalleryng.com/Images_upload/files/gipimukavasotoxidosufono.pdfIn PDF document text
    • https://timminsrenovations.ca/file/vPxf9MSz32fR6bfA.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/57500019488.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/suvazuzabuga.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/41427653545.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/gupukorewujumojiribe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=bangla+choti+banglaPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f0ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF0CE 16668 bytes
SHA-256: 6c00ceac780d3f422ddef1c614ceb0fce5064fd832f35bc1808fe21ba17941ab
font_00_sfnt_off0000ad82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD82 10300 bytes
SHA-256: d35da829f0de4a766598ef8c488e7a64b778882f2611d0d31e6f926755e750fc
font_01_sfnt_off0000c4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A4 17516 bytes
SHA-256: 976e9cf844c5c84c4629b8f86db0981ec3ba6ad9eeec135007e42e6af522722c
font_03_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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