Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f14adcd7b085835…

MALICIOUS

PDF

73.8 KB Created: 2021-04-13 13:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 407aa06b0916ac58e368200f67317eab SHA-1: 8c3fc9a869c72c4fcd459893a8b52d1c01687132 SHA-256: 6f14adcd7b085835d9f142731a7efbcc17b68e41a2e012c3758b88602acc3c4e
156 Risk Score

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 0.9996

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 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://botokaw.ru/strik?utm_term=before+the+throne+of+god+above+sovereign+grace PDF link annotation
    • https://cdn.sqhk.co/tuxisilogok/gJsqgf8/driver_booster_32_bit_windows_7.pdfIn PDF document text
    • http://unlockdeals.shop/harry_potter_and_the_philosophers_stone_book_paperbackpxnin.pdfIn PDF document text
    • https://cdn.sqhk.co/tefivezik/icOhehc/avatar_making_app_for_android.pdfIn PDF document text
    • https://fotobuwab.weebly.com/uploads/1/3/4/3/134368258/gedad.pdfIn PDF document text
    • http://cmb-accueil.com/how_to_set_personal_targetsjlugv.pdfIn PDF document text
    • https://lavivatum.weebly.com/uploads/1/3/1/4/131437335/b0058.pdfIn PDF document text
    • http://kyukty68.xyz/gonuku5ymd6.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/74587010634xz5v8.pdfIn PDF document text
    • https://siganubamisibu.weebly.com/uploads/1/3/4/1/134108806/buleleza-zegisubud-jadavir-vegatuweluz.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/iihgWoA/minecraft_clicker_test_unblocked.pdfIn PDF document text
    • https://rebanurox.weebly.com/uploads/1/3/4/4/134490941/7091337.pdfIn PDF document text
    • http://tameenegypt.com/beginning_programming_with_python_for_dummies60rtk.pdfIn PDF document text
    • http://floradoma.net/healthy_diet_plan_for_whole_bodyodfq9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/avp_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/windows_10_iot_enterprise_licensing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/how_to_change_vehicle_registration_in_sc.pdfIn PDF document text
    • https://576979ff-f939-4980-8793-4b7993fae0a8.filesusr.com/ugd/14903d_1390b8ce97a5436498d3bdd73bfdb9b2.pdf?index=trueIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_3342ca6cb7714fba9fcace138e1534aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lovetijif/osrs_aberrant_spectre_range_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/osrs_fastest_99_fishing_guide.pdfIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_05ce35788500417a99baad97cdbfbc6b.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7D 5500 bytes
SHA-256: 04032200a1668d9d3560405503e09ce1b6a7c5118bde4c25f504c2b72690d807
font_01_sfnt_off0000df3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3F 11032 bytes
SHA-256: a99250463741dc89e680e56cb6c5467825160e85500ad204303d19c97bcce82f
font_02_sfnt_off00010461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 16120 bytes
SHA-256: 46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12

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