Malicious PDF — malware analysis report

Static analysis result for SHA-256 49dd8cde65c81c5a…

MALICIOUS

PDF

110.6 KB Created: 2021-03-15 14:54:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d7b4b153b7653ac1ec71d3a70f6a04d2 SHA-1: e875ee93ae1123a28c0ff9023d29bafda7d1ab55 SHA-256: 49dd8cde65c81c5a04728b5d7c189205ebbec98f1eec71366c40ab738f690e13
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to disposable domains, suggesting a link farm used for distributing malicious content or phishing. The document body, though heavily obfuscated, appears to be a lure for a workshop manual, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=honda+gx160+engine+workshop+manual PDF link annotation
    • http://copyright-help-center.com/tekken_3_all_characters_unlocked_apk_downloadm3fue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_600ed16ab309a.pdfIn PDF document text
    • http://prostosite.site/pexerevurogefubovigli3cw.pdfIn PDF document text
    • https://gikositaga.weebly.com/uploads/1/3/4/7/134773380/tuludekenaxor.pdfIn PDF document text
    • http://lufatomitonad.22web.org/waves_abbey_road_studio_3_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_60278653effe9.pdfIn PDF document text
    • http://usblighter24.site/kegukenavimuzabokalejvg3um.pdfIn PDF document text
    • http://ingmijn.com/sevabozekasiwelemmjzsm.pdfIn PDF document text
    • http://prizinsta24.online/kejopijepenagbv2kx.pdfIn PDF document text
    • https://titenukom.weebly.com/uploads/1/3/4/5/134523185/wixuxubutubexe_kufafatadomevox_gepemotitavo.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/gre_math_formulas_to_memorizeygnje.pdfIn PDF document text
    • http://netewe8.xyz/extinction_core_spawn_codesdhckh.pdfIn PDF document text
    • http://bio-ita.fun/nixowukebesigixagetarxz2y4.pdfIn PDF document text
    • https://fixubosadad.weebly.com/uploads/1/3/4/6/134658154/4bf38c19d1460b.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bavizajo.epizy.com/60001132943.pdfIn PDF document text
    • http://jutidijuv.epizy.com/tudo_sobre_behaviorismo.pdfIn PDF document text
    • http://jadevasaxa.epizy.com/zobokafefovunisesolanovom.pdfIn PDF document text
    • http://kezepinaxozegom.epizy.com/room_booking_application.pdfIn PDF document text
    • http://fetavuxoze.epizy.com/vidife.pdfIn PDF document text
    • http://vepejatudededok.rf.gd/bovodolu.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://www.gnu.org/licenses/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012d85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12D85 17924 bytes
SHA-256: be520300d739c3f43b9d81f13cdea3a5701c8804ea306a41ab1dcdabfd96b2a0
font_00_sfnt_off00011a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A44 5708 bytes
SHA-256: 84f33ae0bdf97f13498d262fcbd2017cbb21df275a9f2aad12ba98c33be61812
font_02_sfnt_off00015db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB8 12424 bytes
SHA-256: 456ad605de35f0fbec774d0e721a88113060ae7d838ab5edda103bcaf48a5a8d
font_03_sfnt_off0001861c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1861C 16192 bytes
SHA-256: 75ae46b37e824a31f3d2919be60c52daf1ed383ea62173cd6befebe04d4d68f2
font_04_sfnt_off00019b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B29 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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