Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab9020e1bcfae5f…

MALICIOUS

PDF

75.8 KB Created: 2021-05-21 03:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 681a12657dc4ff72b064544335331981 SHA-1: ab6e487d9ea73e14a32b36db8723a5ca85160ec5 SHA-256: 7ab9020e1bcfae5f69ebd2a36245634620b239f47c0aa4c6f62653d5a47b32bb
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to compromised websites that host further malicious content, disguised as downloads for popular media. The presence of multiple links on disposable or compromised hosting suggests an attempt to distribute malware or phishing content.

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 http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4416ce99f4---68913601796.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2a736ff8e---55566496406.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918e07706c8---fixodewinagikuvo.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826328b3943---tiwugawojizedupana.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6mpb19fo2iim1191sba3gms6v4/wazelobe.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/js91fkkicv4n7ohbngmu6snibn/551328047.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088e206e6a45---bupumep.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/2f8098594beba259278c909f6665e1f5/39533872494.pdf
    • http://kingalbertltd.com/uploadedfiles/file/kufanevowodejaxetimuni.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a8a24da5b---jurebibuxikukovozabubo.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7f611fcda---48284509330.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/4892d453897fb27628d31b9081679154/63016279245.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/011ebaeb3d424466a2d90eec1052c68c/33868048505.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6stt3i4hudgtfvptae4p4k1io4/3303306900.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070064ede321---40942663188.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ceb3c29d70---1229541548.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16094025e737ef---zovixojopefaxaxujaki.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a69c205259b---76835442483.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=twilight+breaking+dawn+part+1+download+in+hindi+720p
    • 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_off0000dba2.bin
5b9f9dea02df67de38e26daf9781e3da7b458328006896cb14bb23e8d555ed55
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 5484 bytes
font_01_sfnt_off0000ee4f.bin
85347a488cb0e033cd39b9bccfc03eb0af7c90c496d52487a92bdc2bea5beb97
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 10768 bytes
font_02_sfnt_off00011326.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x11326 4324 bytes