Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02740f6853d1d4a…

MALICIOUS

PDF

84.2 KB Created: 2021-09-12 23:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 178ad1d3c4204f9207b1268f7ffe5b14 SHA-1: 89b99a9ea3606b7b8724429b0278af5357353aa1 SHA-256: f02740f6853d1d4a670449ffdf965b80c026743367730bd8dba587f872bcdd4d
154 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate embedded JavaScript and external URIs, suggesting malicious intent. The 'SE_CALLBACK_LURE' heuristic strongly points to a callback phishing scam, where the document likely contains instructions to call a fraudulent support number. The presence of embedded JavaScript (T1059.007) further supports the malicious nature of the file, likely used to facilitate the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=configurar+globomail+no+android PDF link annotation
    • http://newtarrytowndeli.com/uploads/files/96428016568.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/madadabubusikoxo.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/fokev.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/4838365030.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/muxipe.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/mowonum.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/togipenul.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/pudamulobusitifut.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/wigekizaxavok.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a5994e1ff---fofajuzopobizegaborifopup.pdfIn PDF document text
    • https://j26clean.com/upload/files/xejidazenavixumofix.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/ravuroxutadazazaxu.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/47891655928.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/satadisuviperaga.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210906100815.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/xijodosipuke.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/75814534213.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/14511140076.pdfIn PDF document text
    • https://istruttorecinofilo.it/userfiles/file/fiponavesenatikovoko.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109090719232098.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/25042841505.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16134fab5cfaa8---9282173032.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/89587125935.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_off0000e20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20E 18924 bytes
SHA-256: 1e3befae9daed1e5fe0dfe15257300b67443405ff28364885765faab49388abd
font_01_sfnt_off0001132f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132F 10568 bytes
SHA-256: 0bdb5c862d7ae7a9e15c0704031a2e5d72b7b98a83768d2961a27a4a175cb38e
font_02_sfnt_off00012b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1