Malicious PDF — malware analysis report

Static analysis result for SHA-256 edae45fe643914ac…

MALICIOUS

PDF

69.0 KB Created: 2021-10-01 06:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6ca608e7d4979cf732debf566cf53fb2 SHA-1: 89a3b06a6adb96f7423e9c3944901e51cd9e1776 SHA-256: edae45fe643914acdd3aa3b7e0b517f157c183c520abe2a2d9270bf1e0072b40
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only interface with a clickable action, designed to redirect users to external URLs. The presence of numerous distinct hosts and UTM parameters suggests a link farm used for distributing malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://nomylo.ru/uplcv?utm_term=scania+truck+driving+simulator+free+download+for+android PDF link annotation
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16138fe33963a6---zeximokanoge.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16150a49eb061b---vareguporetuvurijifabipu.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/34472664141.pdfIn PDF document text
    • https://nieruchomosciprzetargi.pl/files/file/3780625339.pdfIn PDF document text
    • https://emenu.hu/editor_up/nogarexiximari.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021091418231668.pdfIn PDF document text
    • http://www.og2c.com/images/file/xutedowatigonedenigipo.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/71421795785.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/38559151564.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/71178130351.pdfIn PDF document text
    • http://ge-mak.com/files/49982261212.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/17021174295.pdfIn PDF document text
    • http://ipceurope.com/assets/file/42998792950.pdfIn PDF document text
    • http://submission.jpvm.kr/pds/userfiles/files/zagijubi.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/loxilowusodomoju.pdfIn PDF document text
    • https://cli-kh.com/uploads/files/202109032336103673.pdfIn PDF document text
    • http://inspeq.eu/public/files/zutewelogidivojetipidu.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16131dd5172e43---27640024216.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/namazer.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/weteme.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/82437035634.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/54787145110.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/gulaborerebodopofijape.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/14213920592.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/73462532153.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAB 11236 bytes
SHA-256: 91c9ad10a798550bd4f0eb02d717a1d1f8fd4f8c14133f41f322ba2c1e3e7d59
font_01_sfnt_off0000c9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F5 14088 bytes
SHA-256: 5ac90a021cc81920e64c7ab2f8f860699b91dfa0e0a5601e7525088eaf687e80