Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1baaec5abb76c4e…

MALICIOUS

PDF

85.5 KB Created: 2021-09-22 09:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1d2a993f46cdf44d16026b2a4a08c337 SHA-1: c05c187ac7ca7e9e7fff7ece52fedea31f6c3e7d SHA-256: d1baaec5abb76c4eeb8609232dcce51693ba1cde0b0552111f7dc7c9e0033cd8
176 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_CALLBACK_LURE' suggests the document is designed to trick users into calling a phone number, consistent with callback phishing or tech-support scams. Numerous URLs extracted from the document point to compromised websites and disposable hosting, likely used to host further malicious content or redirect users. The document's structure and embedded content suggest it exploits PDF vulnerabilities to execute code or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://infrive.ru/uplcv?utm_term=how+to+transfer+my+messages+to+my+new+phone PDF link annotation
    • http://bwlpsalisbury.com/uploads/files/91359558036.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/cd0bb822bef0635095c029e59554f5dd/26030744580.pdfIn PDF document text
    • https://oasis-travel.ro/files/71920725681.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/xetinetagu.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e3f3817e9---wulaxadovazefotif.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/68194329240.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/48415669968.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/1402ee4db07bc2825f03f488d554e698/98620032538.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/63340659896.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/velej.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/manoriwokes.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/pizaworivuxadalewi.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/34681552917.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/84989960363.pdfIn PDF document text
    • http://chengzechem.com/upload/files/bixilesobev.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210922_141353.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/93119358222.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/laxupabasep.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/83874734540.pdfIn PDF document text
    • http://infinity8talents.com/userfiles/file/difozimiwefi.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/kukutolosimamimajemetuto.pdfIn PDF document text
    • http://aromata.ru/upload/files/57691616587.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614143f7068e2---46317735413.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/94730843876.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/25315582159.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/51561746656.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_off0000e80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 10856 bytes
SHA-256: 3f915ac0bff97e97b1b43d28350acc101f7b0983ad10c68576f54bd4d9fcc2dc
font_01_sfnt_off00010104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11916 18172 bytes
SHA-256: 0c6c9202f252865363dd78c4161c7a4388abafa547efa8eaac04c6698eeab483

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