Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e9f2edeca5dfcc…

MALICIOUS

PDF

85.3 KB Created: 2021-09-19 07:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bbe698f1dd1abbd1f4791efe4f3ebca4 SHA-1: 034ef1c0d48af6b8e2826ae9528b69f17ef4fa66 SHA-256: 93e9f2edeca5dfccb6de80fb28ff98c3bc876f9ca4a8c980d7d11763eb73f2cf
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded content indicate it's likely part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=best+audio+player+for+android+phones PDF link annotation
    • https://ijfbacknumber.com/editor_up/27146408644.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/22942575998.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/dawav.pdfIn PDF document text
    • http://www.siposferenc.hu/html/30031816419.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/62870362405.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/30779831511.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/pekizukokawaboforanu.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109140703238671.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5097460691.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/78019429395.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/86994630121.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/69738764936.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210917075818_218599829.pdfIn PDF document text
    • http://elektro-galerie-hamburg.de/userfiles/file/tutavunarujeje.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/xesowofekukas.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/3465883165.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2e06b8e4a---49835842699.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d48e08b43---xikife.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/58963664022.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/89220557319.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421c270fbe6---kijudik.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631707842.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/koxewamupomunesodu.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_off0000e816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 10864 bytes
SHA-256: 0a6e92db2681ab3f7b96825fec32bb142ef7c9719b5e062e1f68dc9b93d71c9c
font_01_sfnt_off00010128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 17656 bytes
SHA-256: bcbe17ee7aafd760947cf8affa40d26f2df951ce8ec5602c1ac771d397e89dd1
font_02_sfnt_off00012f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1