Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6de54f843abebb0…

MALICIOUS

PDF

69.4 KB Created: 2021-09-17 11:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 37de1ecaf2de3d25fdde0a6eb3fe19b8 SHA-1: 0b208d4058ce0737146c2d874cd5bd34a5bdbcb7 SHA-256: a6de54f843abebb01cd3de9ee79a580663ab538840f0a6b05a694a31a1299e5f
126 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, many of which appear to be link farms or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the ML classification strongly suggest it's used as a lure, likely for credential harvesting or to redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crysiq.ru/uplcv?utm_term=pixellab+mod+apk+2021 PDF link annotation
    • http://hb1004.com/userData/board/file/kiluvigepogojuko.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3d6523f82---suxakunizivamed.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/73446966715.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/32411067341.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/85307599015.pdfIn PDF document text
    • https://avflash.nl/upload/files/pinakaputukasek.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/73371416804.pdfIn PDF document text
    • http://devveb.net/userfiles/file/padibezed.pdfIn PDF document text
    • http://dc-3ed4d7413bdb.prshots.de/uploads/userfiles/1630586218/files/76013996328.pdfIn PDF document text
    • http://ping-property.com/user_img/files/nojuvuguj.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/9695017072.pdfIn PDF document text
    • http://stelmart.ru/userfiles/file/50605805483.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/woginutegabem.pdfIn PDF document text
    • http://pb-book.com/user_file/file/xevusinupam.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/82907799979.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/fodiziniz.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/20955970847.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/gorofu.pdfIn PDF document text
    • http://18554080.com/userfiles/file/1047864173.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/xegoxerezovupana.pdfIn PDF document text
    • http://chipgene.com/image/files/20210906_064829.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bf7339ff8---kaluvidoxenaxupovagu.pdfIn PDF document text
    • http://methese.com/upload/files/zumamewewubuvo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AE 14904 bytes
SHA-256: 12390b66cb36d119b82c1fd279419b876a93250e14f5e6840ca1735d14554ae3
font_01_sfnt_off0000d7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF007 10712 bytes
SHA-256: 3f76c54837492af9e1b3017ff1052cfd73e31ee755871861385b1fe1e8f27a11

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