Malicious PDF — malware analysis report

Static analysis result for SHA-256 f697de58f8e6f678…

MALICIOUS

PDF

68.0 KB Created: 2021-08-30 23:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 308fadfb9939b2a3246a5f5e65f7cadc SHA-1: 82c2199aa7eeb73163f1ab251078e34d6a969517 SHA-256: f697de58f8e6f6788e8ff9f7caa9bd7a1c89a68ff32b186b8f4b9d51b55937df
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking embedded links, which are hosted on various compromised CMS platforms and disposable domains. While no scripts were directly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://alexanderkanevskyartgallery.com/clientMedia/file/10812225613.pdf In PDF document text
    • http://bocghedanang.com/media/ftp/file/63348863374.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/f3djbt2itofg1lsf044uq964r7/36835496041.pdfIn PDF document text
    • http://www.toptehnik.si/images/biveruwexekuxotutelenur.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/jadijef.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb238d56ed---57010015843.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/30599295856.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/a9b05feddbe4f5f7b8d862d3e9e318fe/81636553705.pdfIn PDF document text
    • https://aedwea.com/upload/foto/roponegosuwavafa.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/71175724049.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/82075366454.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/vafalepijaniwakeg.pdfIn PDF document text
    • https://berbagiangka.com/contents//files/73264033016.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/jlhpmjq2j4botjtfa9bolht6d4/sezakijobifed.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cd1d708c497---figowusogateja.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/kajafamixiguzisoruvewu.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/d93801117a430871823d9ff38d585bdd/51469937312.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160f8bfb164475---mosijoburixatasoloj.pdfIn PDF document text
    • http://hkacca.com/userfiles/30223562679.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/9a52f66f9bca537cc4b950949b7065c2/tibosotex.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/497b76a679b63838c6d05b76052bbbd5/94738376568.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=natural+and+artificial+sources+of+light+worksheetPDF 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_off0000acd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E2 13908 bytes
SHA-256: 4c3bbe29c5163c571080822e8b5e3b060c8940363a41f384e8782ff7e236c654
font_02_sfnt_off0000e722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE722 11012 bytes
SHA-256: ffc76fb68d0cd3c89ccb6b39d5af5965823b5e11410902d1ce805a4c2b05f030