Malicious PDF — malware analysis report

Static analysis result for SHA-256 74aa4ad254e75e00…

MALICIOUS

PDF

72.0 KB Created: 2021-09-23 21:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 52a9dac8cc62f7998fd02fdcc6464ce9 SHA-1: 463ac7ea4fbeab096abb93baf3f582b1c9adb0f9 SHA-256: 74aa4ad254e75e000626806bdddb9ec32388b4dd1cb987f283c1aeab9d36d341
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, a common tactic in tech-support scams or credential harvesting. While no scripts were directly extracted, the presence of numerous external links, some pointing to compromised CMS uploads, indicates a potential for further malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://forti.in/userfiles/file/72978373869.pdf In PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/cie7ssdh2av3vshev88vdafq9m/35337826993.pdfIn PDF document text
    • http://labsshop.com/d/files/8752024380.pdfIn PDF document text
    • https://mlspoland.co/files/file/94478613671.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16321214122724.pdfIn PDF document text
    • http://pharmabiosolutions.com/filespath/files/20210913204544.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/78780072546.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/6eid9608o6br8hddjg4ovipa0f/pepimimejiridekoguxe.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202109081729116997.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/85774285926.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/99347c12d8ede112db50923700003687/zajukixugamivuman.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/64380213828.pdfIn PDF document text
    • https://grouptm2.com/contents/files/rirulukidorixororekadajaw.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/77ejt6m4bfi8v8g1llj639e034/puwelagovudefu.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/30865564911.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/zegatajefajatutewub.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/sutujukowetifi.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/18503215848.pdfIn PDF document text
    • https://digireg.at/upload/rupoxugav.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/gimatifuwuvid.pdfIn PDF document text
    • http://santeh.md/img/files/7837571370.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d1bb7d3ce---gaweditojujabe.pdfIn PDF document text
    • http://bburago.info/admin/fckeditor/userfiles/file/pivajakazowuvizor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=order+acceptance+letterPDF 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_off0000b842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB842 10152 bytes
SHA-256: 01c1553f8d302409fd9b51b00e8fc5a493297232c7fb37849f26a001a7e17261
font_01_sfnt_off0000cf1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 17092 bytes
SHA-256: d0c519377cb88904f474cd1e8cb873a617eaa36202c54e6953f63ab87ba61d71

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