Malicious PDF — malware analysis report

Static analysis result for SHA-256 1041e9a65e17369d…

MALICIOUS

PDF

80.9 KB Created: 2021-10-09 01:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f489bd7f6aa920bf3b33ed9c924de417 SHA-1: 437d06138ac0693244752aa421e0b6b99d28d325 SHA-256: 1041e9a65e17369d09953b930b40bf937e2af7f775999db35f65f3bbd4338706
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest the PDF acts as a link farm, with many URLs pointing to compromised WordPress upload storage and disposable hosting, likely to host further malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, consistent with callback phishing or tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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) 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://smidgel.ru/uplcv?utm_term=first+love+centre PDF link annotation
    • http://majortaylorride.info/images/uploaded/file/85241862351.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/davabibaxufozijoluviw.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/kitarewiwugujurotidaxip.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/69459040435.pdfIn PDF document text
    • https://equinox-e.com/upload/files/76234215194.pdfIn PDF document text
    • http://flapboxes.custompackageboxes.com/userfiles/files/11537345771.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/zukeju.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614308eff16f1---80461644500.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/sirujuxowuvop.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143e0a31255f---92083366817.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16148063bced1c---nawulo.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/15591204730.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/doxuru.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615e892244e8c---simubulobamibixuro.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614f0b5309f9c---84359554715.pdfIn PDF document text
    • http://szwygs.com/upload/gepafudajavibolofipi.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/79091832190.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/jawev.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/sekisaponoxu.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/79533180704.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/nedoz.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-19/images/files/xiratikuworajujud.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/funonuvewuk.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210904122919417.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/fesofotoko.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/4b0c7d4abf7648b4759752d68e3bcf91/74402285766.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_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 10104 bytes
SHA-256: 0d82c0192bf463d3a3c2591820a34426016dea95217069c3dcb111262ccabd53
font_02_sfnt_off00010330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10330 19668 bytes
SHA-256: 98b16965f821aaee7f6fd9ece3e1f43a9bcda7660de9645d6546a7d31fc0e2ee

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