Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2c6ed61ede4afa…

MALICIOUS

PDF

70.1 KB Created: 2021-09-18 01:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 30bb78c846f0fd3f959d6397986ac620 SHA-1: 7492dd820cc66ddbfaf4e6bba0335e33e0249300 SHA-256: 3e2c6ed61ede4afaab66391a067d6ed55e75254fc2d3ac98ba5ef801333bc838
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs, with one identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://kmkmekanik.com/upload/ckfinder/files/mibeg.pdf In PDF document text
    • http://geodavidepini.it/userfiles/files/19342168499.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/wuxefelekojexebebibevuxe.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/64566429727.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/mesorukegedodevizujof.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/lajaluloxoribafavegofod.pdfIn PDF document text
    • https://franciscovalles.comtraining.cl/userfiles/files/86312880261.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/38070228994.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/85995720460.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/vitexoxabapibi.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/janolirov.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/tatino.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/vofofipe.pdfIn PDF document text
    • http://farashimirooz.com/files/bafibazifikelufedoputafe.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/36744840273.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/5967990117.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/diwopexibemogapemizewobis.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/93399432871.pdfIn PDF document text
    • http://insei.eu/userfiles/files/68108196489.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/lonisexuzukuresezixa.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/31242198442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=minna+no+nihongo+kanji+1+pdfPDF 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_off0000b185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB185 16284 bytes
SHA-256: b82634467d992cf0d81cdaab236aa7eaa99a51569c42e94327550f10ed817c35
font_01_sfnt_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 10500 bytes
SHA-256: 42ee0ed3f4054c01bcd5c726d87d90be575dc374dccc4908991859608032617f

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