Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cf8f0b4a29e46e…

MALICIOUS

PDF

91.8 KB Created: 2021-07-16 05:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 33976157ebe84d6927931034447ff439 SHA-1: 7bd4a197dd5f1578f7ede9a66d1fc312220fe366 SHA-256: 47cf8f0b4a29e46e39b7ffd8261739e8d0e6cc18715bb807c9a3fd55ad97ada5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs and link farm patterns, suggesting its primary purpose is to redirect users to malicious websites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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
  • 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.
  • 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://philabc.ru/uplcv?utm_term=keke+do+you+love+me+are+you+riding PDF link annotation
    • http://barudan.hk/UploadFile/file/20210617074702188.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad94d257c60---79505470312.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bab0a6201d5---81479364122.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/73137478050.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/60033754777.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/9af2482a0801cdc426e7d14d3b8fc4ff/50166787532.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/dazuxusudakuk.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/1a5990c10dc3199e52dcb40322936dcd/99946514799.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c091008bc29---16307315122.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/83218777494.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/4b706a383a29375fe08b2edf5f9fc423/44120487540.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160989914aedc9---fumigasojaluxotonejapi.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/lelobofarobasufaluko.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/jikoremiserofefojapaworiw.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/u2rpaseem4lgrq2vbrat2krhl6/somowitoropitos.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7939e4be2a---jagomeruxenuzokurelawopa.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/78178471655.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160719b7086d29---juvodamizaligemijoruf.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38f608be3---99752742267.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/gunamuterudezib.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/d4c66e0f859a4b2ca849e85c6d7de9b9/2459625776.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/491f1fd59462e86fc9af69ef237b6492/fomikiroziruludij.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210523223832077.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32d1cb626---wamevoligikifubafi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 10688 bytes
SHA-256: 04ae9d43ed84e6147a578ec2bfb986b597e2ee4102eb0d551ab4f3aaed386813
font_02_sfnt_off00011b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4C 17500 bytes
SHA-256: d37e579d603ea799ae4767e880c959d2328e57de30afda8cd33803ba8e407e58
font_03_sfnt_off000148bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148BD 16904 bytes
SHA-256: 9ee9a847a4d673175b9dc6d1dc536aacbdb9194570296dd496e6c5e5614c9d19

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