Malicious PDF — malware analysis report

Static analysis result for SHA-256 d021c6ed322374c3…

MALICIOUS

PDF

76.8 KB Created: 2021-06-13 00:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 43a66298f2b3182ab5cb87f9d08eed0c SHA-1: 8f997519b76ef86fc334e15083ee527821588378 SHA-256: d021c6ed322374c39ab79f18cf224b4696d5df3c69b3b0807fabbee43e22b7ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous external URIs and link farm heuristics, indicating an attempt to redirect users to malicious websites. ClamAV and ML classifiers confirm its malicious nature, flagging it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to exploit users by directing them to compromised or malicious domains for further payload delivery or credential harvesting.

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://pixomot.ru/uplcv?utm_term=the+magdalen+manuscript+epub PDF link annotation
    • https://atlastoursntravels.com/userfiles/file/febijeguju.pdfIn PDF document text
    • http://isvpro.com/custom/files/nisisuj.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/a7acd021d03a86ef9c7bd086e943e7f5/wulajopapimesuluzunaji.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f67999229---lizibojokofenobotig.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/r2e0le3jhogk03s3etvue9r0u0/20632588367.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/tumarizi.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/b4be54157c3710c03292d2c436a3f1cb/kisepadaxavif.pdfIn PDF document text
    • https://sankohomestay.com/userfiles/files/zoteguvubebunoliwojil.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/4a0123fff576090e4efc2734bd5b68fe/17833114417.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/8628622691.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31f7c8ed35---99260509261.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/waduvuzibamexamujawavoxed.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/0vu49ikfi1qao3bi084fofp8am/delokubobakaxu.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/6tu15biv6rhfbk3hs297tpnesq/dupobunapebebozedaxevapav.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f086bf879---muxezagojimidusa.pdfIn PDF document text
    • http://markone-tools.com/upload/files/kikefub.pdfIn PDF document text
    • https://actorconseil.com/files/file/17129322480.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/ccm12c9p8i3k2m41b676dso5u7/buxaba.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 6476 bytes
SHA-256: 5c96381b2956ba85bdc606e02b4bc67750563a6a571ffb0d67253edb336a5a64
font_01_sfnt_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 5576 bytes
SHA-256: e107b11ca0760b28fd5b3e8fc52e823c80d318157f26d9a87760eea32b839c71
font_02_sfnt_off0001000a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000A 10996 bytes
SHA-256: 4996d8261afd2feeb52aac63ed83965367bb0f90a2ce1727f15c31cd8da5c8fc

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