Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c61822ba0c6f712…

MALICIOUS

PDF

82.9 KB Created: 2021-09-11 00:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0750d138d81827d67923d1b078b775c9 SHA-1: 3b213ee184a6a088ff908f6194634d65e17283fc SHA-256: 6c61822ba0c6f712292e5160927cb38848a343ec479b87c123ed39e419d20d86
176 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites hosting PDF files. The heuristic 'SE_CALLBACK_LURE' indicates the document's content is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. No scripts were extracted, but the presence of external links and the callback lure strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://medvor.ru/uplcv?utm_term=how+to+hide+call+history+in+redmi PDF link annotation
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/783f81d751c810a3bf86ad50aa9cf533/76511755333.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/ralodimijevovox.pdfIn PDF document text
    • http://desense.eu/uploads/wysiwyg/files/bofusumaw.pdfIn PDF document text
    • https://subarini.ro/mm/file/mewudesames.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/34895861579.pdfIn PDF document text
    • http://frchem.cn/upload/files/79551945799.pdfIn PDF document text
    • https://toocapen.com/files/67196535985.pdfIn PDF document text
    • http://jucal.es/images/file/77234669008.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/91264180502.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137527e1d475---jurusava.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/89muie42gqemrpfpi17ceudkfn/46814078170.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/kkjg9bj2dmu3d9h0savq3foftn/88272691790.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/10/file/fulezoferododawadolokutaz.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109091826006281.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/40473840408.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/95141854202.pdfIn PDF document text
    • https://service-panev.com/userfiles/98625489433.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/92168464714.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/e6c41665b3ed365d2e3c49339d730e94/lidogupusuxelibafotap.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396aa994d02---74619297268.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/57755670012.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/44896240072.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_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 19436 bytes
SHA-256: 89b96c67ed160b1e1abdcbfb9e1bff3351918d9ed1f0cd90fb7dd0fbe72e2c2a
font_01_sfnt_off00010d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12550 10828 bytes
SHA-256: ec8a93c12536a4f63b561b2d42881ccecc8692d8fa5ef2fb49bae2041c78ff3e

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