Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29a637551ad2af2…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 21:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5052a3267d427fe9c71461431f36a20f SHA-1: 60d74e22c2955d322ffba4e39ed3aa2172f2bb67 SHA-256: d29a637551ad2af2c83fb2f9fc884ad4142e5cbb4af2d1dcfd42c2cc7a145d86
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, many hosted on disposable domains, suggests an attempt to redirect users to malicious sites or distribute further payloads. The heuristic 'SE_CALLBACK_LURE' further indicates a potential phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=advantages+of+mobile+operating+system PDF link annotation
    • http://chukguwang.com/files/fckeditor/file/64089289108.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20219141859406548.pdfIn PDF document text
    • http://saimiri.name/upload/file/91050544151.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/28183403876.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/fowiwav.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/11544646908.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/lapofakakizagebomewazoki.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/55935104173.pdfIn PDF document text
    • http://pileki.com/imgup/file/gideborezoxemafebumaxid.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161448d6360262---lujitakixutazuvul.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/1523268759.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/risubasalijoxineroviliraf.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-18/20210918072640662053.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/28090223760.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/5f5b1f085bfb3425517f0ad557682773/gurumapezobejanulojedosu.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/nufonozimidikaketim.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/60708817300.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/10967018462.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/22892532842.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/zijuronusenow.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/14122186560.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/15293403550.pdfIn PDF document text
    • http://masonhn.com/d/files/jetowuxonebonusumo.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/webopetipogisosuxidojo.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_off0000d6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B4 17604 bytes
SHA-256: ffa5af6351484e5b6ea041eeb04e616f943d33fafc658e3e48a2c5910d28d270
font_01_sfnt_off00010412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10412 11144 bytes
SHA-256: ce96f26584892f85eb7749c1ae8e129fc1afb8c42ce53760f422b51e7d27470e
font_02_sfnt_off00011db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1