Malicious PDF — malware analysis report

Static analysis result for SHA-256 047996ceae48246b…

MALICIOUS

PDF

70.8 KB Created: 2021-09-17 22:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ed2a75ab7178120076e50e5ea1662fa0 SHA-1: aadf6b3e8611bba0aff382785db745a0bead229a SHA-256: 047996ceae48246b034c4755b152dc236b590d16efcbe9e11be602aa9cf46073
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and employs a callback lure, prompting users to contact a number for support or to resolve a dispute. While no scripts were directly extracted, the presence of embedded URIs and the nature of the heuristics suggest an attempt to redirect users to malicious sites or initiate fraudulent communication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=how+to+use+speed+dial+on+android PDF link annotation
    • https://uangraja.com/contents/files/mukogipevaxosokafisolora.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/linufategoso.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/67838879088.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/nopajuditiregelosur.pdfIn PDF document text
    • https://jmclimatizacionhvac.cl/images/subidas/file/todupewujod.pdfIn PDF document text
    • http://fitviewer.com/files/file/77498641569.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161352c9f270db---manivojabuwokodafokumole.pdfIn PDF document text
    • http://nktrading.qa/file/files/razofezigelebavopikobe.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/xuzat.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/34414358811.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/xanirapugixanadibogipo.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/22510089402.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/38339946357.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/30378860111.pdfIn PDF document text
    • http://zeci.nl/im/image/408470547.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/regazoruvokurarumapexamul.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/bazugawe.pdfIn PDF document text
    • https://777mto.info/contents/files/21616305544.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/26386003943.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tagitipoje.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/zifat.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210906223120183.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/92162394431.pdfIn PDF document text
    • http://gkz-crimea.ru/userfiles/file/90873767229.pdfIn PDF document text
    • http://abcs.umontreal.ca/upload/files/18303553137.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_off0000b53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB53F 15688 bytes
SHA-256: 9ae21396dd1f092a5b05e731bc7342c73eb28005b866bf0d859fed77edb6ac26
font_01_sfnt_off0000dd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF553 10564 bytes
SHA-256: 543b22393287ea50817401fe80d7b1b5490cfb01d6c43bcd696e373adfbee560