Malicious PDF — malware analysis report

Static analysis result for SHA-256 c814f971d40fe475…

MALICIOUS

PDF

85.4 KB Created: 2021-06-12 15:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8bef8ea41bc0f4d4874cf6bb7fe56b4c SHA-1: ca03b149a3b316520960edbac23b85ff259bb799 SHA-256: c814f971d40fe475b5bb5f8c7c917a446152ef86c4131175ebab9351029b3086
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with one prominent URL pointing to a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to a 'Satyanarayana pooja book pdf in Tamil', indicating a social engineering attempt to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://huntic.ru/pbw?utm_term=satyanarayana+pooja+book+pdf+in+tamil PDF link annotation
    • https://dopesijej.weebly.com/uploads/1/3/4/6/134612330/divaxaj_bivatobojap_powebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_601a38864c1b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393515/normal_5ffae40cac35d.pdfIn PDF document text
    • https://tedaliduvif.weebly.com/uploads/1/3/5/9/135957254/7269312.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wipadewor.pbworks.com/w/file/fetch/144670368/19997441063.pdfIn PDF document text
    • http://pusavivo.pbworks.com/f/gowijegagega.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144618402/download_game_zombie_3d_gun_shooter_mod_apkpure.pdfIn PDF document text
    • http://donigipoz.pbworks.com/f/chopin_ballade_no_1_op_23_sheet_music.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/58674844462.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/879338484.pdfIn PDF document text
    • http://dutamaboxiwa.pbworks.com/w/file/fetch/144829167/72758058834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a23eeb7-b882-4929-8784-e272f2212b47/is_revenue_stamp_required_on_house_rent_receipt.pdfIn PDF document text
    • http://joriguzo.pbworks.com/w/file/fetch/145123635/72623368057.pdfIn PDF document text
    • http://divogatupum.pbworks.com/w/file/fetch/144776265/wow_tv_listings_montgomery_al.pdfIn PDF document text
    • http://movovepavuzi.pbworks.com/f/percy_jackson_and_the_lightning_thief_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e070caa-25b2-4c0a-9d38-c5491eaf5e73/interior_designing_colleges_in_hyderabad.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/w/file/fetch/144455229/how_does_twin_tub_washing_machine_work.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
stream_003_off0000f3d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF3D5 23472 bytes
SHA-256: 93af15b963470ed525776750484edf0ca0aacde5745de18aed30fa0fa666ab08
font_00_sfnt_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 5492 bytes
SHA-256: 1711a2c3957be8e54b61de44a9bf745813718f2247d0fa9714639e8b64ba6455
font_02_sfnt_off000124bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BB 10580 bytes
SHA-256: 3e1b2dc10d3764caa7fa71832dbb6105f9729e68c88e84c5160d0e0dc0df21f8

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