Malicious PDF — malware analysis report

Static analysis result for SHA-256 151e0721fba61366…

MALICIOUS

PDF

96.3 KB Created: 2021-09-18 05:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a7b0839fffdae1c11e1f6294ef1b23ed SHA-1: d14fc41ee61c0a9925fccd16514a4c1abbdb8141 SHA-256: 151e0721fba61366a04daddd50297527fe444e05cdc454aaca5854104a1d0e6c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a fraudulent number. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to deceive users into initiating contact for financial gain or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/37064253509.pdf In PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/kezetumavesenupuzago.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/zosunokezoduloba.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/80352229073.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/59609547824.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d43a957777---61310361017.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/ponujokelabamajutesovare.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/77279240456.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/rijezirasutisu.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/24757827286.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/3596181831.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/zevuvolenafofisabipawukal.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/muwiwe.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/75684773734.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341df5b5350---xetixoburizipefilifeweko.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210904043319.pdfIn PDF document text
    • https://designclarf.it/file/68505203072.pdfIn PDF document text
    • http://mebco.ru/images/file/soguwukoluzusibijidosud.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/68388509150.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/fesipogekozodufowexivuz.pdfIn PDF document text
    • https://redac.ch/upload/79247670090.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/zufufotakorinekuxaliv.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/75563514045.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/56847947486.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/83862888176.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=rise+of+lost+empires+androidPDF 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_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 20656 bytes
SHA-256: 1651acfc6684c2936f5b0b1ff21a6e3ef3f824792f9defa853c83ecb62ca07da
font_01_sfnt_off00014342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B59 10704 bytes
SHA-256: 4cda34348a2cff0656941239328b78ac84e33cf10f3c55e829312dc9486b0c73