Malicious PDF — malware analysis report

Static analysis result for SHA-256 4518c5d855062388…

MALICIOUS

PDF

108.2 KB Created: 2021-04-06 14:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 475cfe20ec88b9b893c941cf621c3887 SHA-1: 6ad654efc595ef8ea3caa3b12b29c7433c39a3fb SHA-256: 4518c5d8550623886a2bf0fcfbf0ebf0d6ca17f0eba370dd2c3375e3cfb492be
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/wix?keyword=idle+heroes+hack+apk+reddit PDF link annotation
    • http://preplafond.xyz/english_language_video_mp4kpkpm.pdfIn PDF document text
    • http://pe50off.pro/metal_gear_solid_2_substance_ps2_emulatoride3n.pdfIn PDF document text
    • http://komarovskii.xyz/613066616209t8qt.pdfIn PDF document text
    • http://handler-autoscout24.com/terexokonuxozetisemikaditi0py5.pdfIn PDF document text
    • http://kigurumi.org/253447107248sm4p.pdfIn PDF document text
    • https://sovivagigeb.weebly.com/uploads/1/3/5/2/135296454/zituxugejivapibogup.pdfIn PDF document text
    • http://probmaka.tech/animales_vertebrados_ejerciciosig6xp.pdfIn PDF document text
    • http://luminar4-download.xyz/clearwater_florida_white_pages3z3jb.pdfIn PDF document text
    • http://oyuncuxx.com/boss_gt_100_anleitung_deutschsy7jw.pdfIn PDF document text
    • http://yourcy.com/simosevikaliwqmbo.pdfIn PDF document text
    • http://kyponnik.online/hush_hush_series_movie9ds67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_601eecfff1dd3.pdfIn PDF document text
    • http://blancop.xyz/excellent_gift_ideas_for_heraq8gl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_6056d0cb257bf.pdfIn PDF document text
    • https://jigibomafife.weebly.com/uploads/1/3/0/7/130738667/1811183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fd67978620fc.pdfIn PDF document text
    • http://organicnu.info/tinokidaresewotuxotg9790.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.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_005_off00013fe0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13FE0 9340 bytes
SHA-256: d2ccaf7a4cc238bee06de45adb6c4c8f22dac520c9eb76ffa2f34ead186bf375
font_00_sfnt_off000123b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B7 2988 bytes
SHA-256: 64c3aca94289fcf98f4d1f55cee411960cf78aeaddbb63e76c5a5287d03c9ac0
font_01_sfnt_off00012e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E67 5160 bytes
SHA-256: 32c8b1f4aa2474b6e77bde6aed46f2636294fc7ea6d694348890fe9ca78da9fb
font_03_sfnt_off00015a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A11 17292 bytes
SHA-256: b46cb5b47f2eac4c09ceea34bca457724a824dc8c6d44e8083598a85e2a82d12
font_04_sfnt_off00018d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D20 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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