Malicious PDF — malware analysis report

Static analysis result for SHA-256 e747627ffad45612…

MALICIOUS

PDF

81.7 KB Created: 2021-09-18 05:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9ed49e9f07bf4e149fa33d4c8120c2bd SHA-1: e68377cdb71dbfd3b428aa7a95d15457f4c31bdc SHA-256: e747627ffad456125d2a9145ab97fba1bf1243b77c3d5deaaca8f495b3f8605d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the document prompts the user to make a phone call. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to deceive users into initiating contact with the attacker.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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 http://innovad-ltd.com/userfiles/file/nopukinezagujimix.pdf In PDF document text
    • http://tokyosushilohaus.com/uploads/files/26837193227.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/kubaje.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613736b483204---furebolobiwisozufexol.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/54418171276.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/nijuvekavozobaxurafas.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/31082984299.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/98259102353.pdfIn PDF document text
    • http://gibisch.org/files/files/9897745712.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/nigop.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/76258110581.pdfIn PDF document text
    • https://mayxaydunghoangphuc.com/userfiles/files/26377789834.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/basopon.pdfIn PDF document text
    • http://honghuibio.com/d/files/gatokabapokovez.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/pewuzoliborasovane.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/67747592756.pdfIn PDF document text
    • http://parentini.it/userfiles/files/28791566837.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/sanugipidemira.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210913134435.pdfIn PDF document text
    • http://arhive.np-sp.ru/img/file/xisaduka.pdfIn PDF document text
    • http://matras-devison.com/upload/file/zulobuvareropojudodefo.pdfIn PDF document text
    • http://kietminhrivet.com/upload/files/92111592760.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/nizofozizenukulomutusilas.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/muvoripumisifadamek.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/jodibiniko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=hitman+sniper+play+storePDF link annotation
    • 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_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 10516 bytes
SHA-256: 92d7e8ba638aec5cfc6979c517038303feec4752787820d6d850d000654a7ea0
font_02_sfnt_off00010d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D40 17140 bytes
SHA-256: 501cac04c20ca47860815da79106565a03bac4e9e24d1be921ca160631121fda