Malicious PDF — malware analysis report

Static analysis result for SHA-256 0649fe41b3ec30e7…

MALICIOUS

PDF

76.1 KB Created: 2021-05-27 00:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19beeea68d03956d0c0a99903bbb9ea1 SHA-1: 735b9116afbe65a7dcfcf606c9033db947a72500 SHA-256: 0649fe41b3ec30e7a395ac0bfaf101ca259ca832670bd91ef2d180ff968a8168
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm hosted on multiple compromised websites, directing users to download a 'gta sa mod installer for android'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a trojan or phishing content. The embedded URLs and the nature of the content suggest a social engineering tactic to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/b60a502594bb7acb54dd4f039222eabd/wozanivuz.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab782926342---gaxuviwinulunad.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/22c09efc0cbfed5d74c5cf82f7dde35f/52948676190.pdf
    • http://polymer-optix.de/userfiles/file/57670868808.pdf
    • http://meble-tk.pl/userfiles/file/bodenimuvakusiwuwibipavam.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/6vo7qkvi9h1s360frbuti2kvm2/33951453684.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/045a98c305c1c815ce80f5306b1224d8/zububuzaki.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/e57a9665001653dc04cf930d3c9186c6/bukijuli.pdf
    • http://arohitourandtravels.com/userfiles/file/98365675291.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804efaa8d17---towadesos.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/365d84pfcmtrk6o2hq63nafet4/71298452208.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160756fa578d63---63284246071.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c90c2cfa3---16240457961.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/29a74a692761508be84504de7d38097a/warevamemebetinoxukozowes.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/hmng29f3hsenhj9q92k0c04rg3/vowekatonobeb.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca71158aee---solozurenojukupu.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/te3ppn86a4crcvlm6tk6bv6al5/makaba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=gta+sa+mod+installer+for+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1cc.bin
52b3a8dcd40cd43460432ff35c0d719a74c949a2f88e952cbb985d17395a7de9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 4872 bytes
font_01_sfnt_off0000f240.bin
5d4c7cf39f99e5e7e8a8e88ac1c11dbd245a9b82324342e9edc5e4b6c3b8468b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF240 10196 bytes
font_02_sfnt_off000114ea.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x114EA 4324 bytes