Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b22cf96e6abadb…

MALICIOUS

PDF

82.7 KB Created: 2021-09-16 10:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e681ed644d791c3c576fa82ca248beb7 SHA-1: 77170118dbaed91c7c3e739521c85f0a9f19f01f SHA-256: 65b22cf96e6abadbe8ab5a63a4a49bd95f4638bcecf45fe20e55081a2cbac2ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a high heuristic indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://entryexpress.online/chapter_images/files/57253262761.pdf In PDF document text
    • http://dakov.hu/_user/file/malolanikive.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/pusakarulikotinid.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/movolilo.pdfIn PDF document text
    • http://rococosofa.com/files/files/42183167069.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/10133623451.pdfIn PDF document text
    • http://koddous.com/userfiles/file/nuguziluwadixewovodaroduf.pdfIn PDF document text
    • https://duel.pl/userfiles/file/vilakarenudo.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/49522896189.pdfIn PDF document text
    • http://chemicalengineers.ie/images/bafivetugavel.pdfIn PDF document text
    • https://anakaygame.net/calisma2/files/uploads/31602350295.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210909_214745.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/fajeturejaguruj.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c8f5f38886d76631d70cf1b929d045f9/tulik.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/96512545427.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/jojozewafotaxofaxijinaj.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/daa9ca824964426fa44f00147c4a2ee7/49521601816.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/62633823806.pdfIn PDF document text
    • https://aashianarealty.com/file/wesuxedesogagonax.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/libekomobeluxagomiriwosom.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/vopomivabe.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/jexuwo.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/sexekego.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/duwetimapip.pdfIn PDF document text
    • http://mqskin.com/luutru/files/21064628366.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=teamwork+in+group+projectsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 11040 bytes
SHA-256: 69615b4a0d241832996e904f7170dc8b1bc68196ba14beebb1861f979e09f499
font_02_sfnt_off0001128e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128E 16528 bytes
SHA-256: 9c4c079f375d4eecbe0e1392121f567ca193d76d93efb38edb624be48d196e0d

Open this report in the interactive analyzer, or submit your own file for analysis.