Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff5db517cf1dba2…

MALICIOUS

PDF

83.4 KB Created: 2021-03-05 04:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1e6ef3970f6ad1c94250279e20ca52c8 SHA-1: 2999210beab322c66e1b04242e38a6059c33e898 SHA-256: aff5db517cf1dba2e56305a626e60c56d39b129def882af4f4e0b049d7adb1ce
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/123?utm_term=best+sailing+knots+book PDF link annotation
    • https://cdn.sqhk.co/mexovaru/iNhjWhi/29011264249.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/ggOig45/fenisa.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/CtPhgrI/wrecking_ball_chords_ryan_adams.pdfIn PDF document text
    • https://fotovotujipibar.weebly.com/uploads/1/3/4/2/134267097/3058201.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/jhAjbiE/manual_de_super_mario_bros_3_en_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/pYifhiF/the_zombies_band_merch.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/jjiigfc/10176128186.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/h8ghhg9/power_rangers_legacy_wars_street_fighter.pdfIn PDF document text
    • https://vurovovi.weebly.com/uploads/1/3/4/0/134040995/1612830.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/ibBDTp3/marvel_legends_phage_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wokiwife/jhmCnj1/kemonovipufojobugusi.pdfIn 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
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_4949ffa76fcc4c2caf3bb2c61fe59b96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/tezokexowof.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_ab1972eeb0f044cab99616bb0c5668c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vufupu/9361138742.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/11517596177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa46582-8c18-46c1-8df8-1765433f582c/48375872778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d23e26e-965a-47ba-82fa-8c704eadc9ef/runimep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fdbbbca-31c7-4131-a83a-22da2ad4b3e2/tedetuja.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/android_sqlite_app_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df811aa-a9c9-4883-b18d-1cae46c594c6/wexagazidofefeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5224bb15-8faf-46c1-8059-78ae8fa5862c/16406347039.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1D 4800 bytes
SHA-256: 673b5c8404a68f792524f2b2d5cc6299b19cac65460a4cd3d64598685978f96c
font_01_sfnt_off00010c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7D 10924 bytes
SHA-256: c05d4ce7c6f0910658d13d888961acda9d79d9c4fe25053e4cd189c78e9238e0
font_02_sfnt_off000131dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DC 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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