Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8414d18c3bf6906…

MALICIOUS

PDF

79.6 KB Created: 2021-06-10 16:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4fb3870f0f7f5ca837b266aaaaf6e08f SHA-1: a9f9702f2a3a4ee1030f727b3cb36f24b681a4ab SHA-256: a8414d18c3bf690682c268b8ddcf0236e4fbd40af148d882be3258d4f293d34e
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that appear to be disguised as download links for movies, but likely lead to malicious content or phishing sites. The presence of embedded URLs and the overall structure suggest an attempt to trick users into clicking through to compromised or disposable hosting sites.

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://drafthe.ru/uplcv?utm_term=tamil+dubbed+hollywood+movies+hd+1080p+free+download PDF link annotation
    • http://applexin.com/ttpsea/files/file/3931782575.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e76ea8ccc385611756e35fea5029f498/kupirusidazi.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/df38a75af628677e7f0637860292145f/konewokedidepug.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5e8d54b74---33167248787.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16082f0ca0fa1b---32633453886.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/rowamesomutixir.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/54582615326.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b1b44b0fe---poremivawimutufureg.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072f6a8ccbf4---sadew.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/8umn8gtl0ch4krm8alpp18n4do/zazixowobatiziruvuj.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/50750397544.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/pefowejabuvipuwefab.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/38312adb108ead3a7f4edbb29e401114/ximekutopenajajowojoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000e0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0ED 6012 bytes
SHA-256: ceebb5a74a450c2acf8864e37c73e260867e014005f9685fd903638cfda7234e
font_01_sfnt_off0000f552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF552 11272 bytes
SHA-256: 535a14de6cf3a50bb0d960f0f9b790b685fb5f3dce0255b1b3def81581f34c1a
font_02_sfnt_off00011c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C06 16112 bytes
SHA-256: d528b978a9021663df294195b0caaec793fcec038aedfb9ae5bdc1b32a3b4552