Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadafbdca62f8466…

MALICIOUS

PDF

80.4 KB Created: 2021-03-09 12:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1a39bed485036d674e82d1ec1bf734b7 SHA-1: 9e884ba7efa77650003bf958821eeb871f20b487 SHA-256: fadafbdca62f8466b3c9ea38726d4ab34d13e9ff8aba2d1e01ea5a6d8615c0e3
186 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 0.9998

Heuristics 6

  • 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.
  • 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://xezojetit.ru/aws?utm_term=yaesu+ft+2900+manual+portugues PDF link annotation
    • http://copyrighthelpbusiness.net/tsunami_hollywood_movie_tamilgrwby.pdfIn PDF document text
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/duwebakovegebu-jiwisix-poduzoboviwu-zitobufube.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/jihMXie/food_wars_season_6.pdfIn PDF document text
    • http://rankingcoach-apps.com/a_sp_ka_full_form1c8hw.pdfIn PDF document text
    • http://ogranicbio.space/widapaxarokuderuroue9yf.pdfIn PDF document text
    • http://bubble1.space/922901946930hzky.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/ZjaSpjC/call_of_sniper_final_war_download_apk.pdfIn PDF document text
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/jawomavetoxoxezo.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/XwEzXjj/best_armor_mods_minecraft_1._15._2.pdfIn PDF document text
    • https://mujabimebedegi.weebly.com/uploads/1/3/4/2/134234846/tuvefe-xovudubax-wudasivudiv.pdfIn PDF document text
    • http://usesalle.xyz/is_9000_dollars_a_lot_of_money4pugz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_85e32287a79a464e88d47c5ee9dc6679.pdf?index=trueIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_5441e8af68b743d98a46f742367022b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirosisob/best_guitar_song_chords_app.pdfIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_5b532c151d1749f59a9b403637bd5266.pdf?index=trueIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_b217cc437b2e479f9a34270188382cdb.pdf?index=trueIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_9f63784579ce408ab68404bcd41d5511.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/7466458082.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_5c2985a6d11f4e5cb722e324bd7f5d45.pdf?index=trueIn PDF document text
    • https://fccid.io/ANATEL/0267In 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_off0000df01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF01 5612 bytes
SHA-256: b644a330d25fbabc7b17584fb946b6949ea5aa26c9236f04366d9ce1225092f9
font_01_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 14476 bytes
SHA-256: 39befc11d786428d1eff830fc0bdfc6633d5e3d749b20ca561ec87cc864faf67
font_02_sfnt_off00011f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0B 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501