Malicious PDF — malware analysis report

Static analysis result for SHA-256 16af7621520e6213…

MALICIOUS

PDF

74.9 KB Created: 2021-01-29 06:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b5af7d1f2efedcd1ababd22ad456703e SHA-1: 77de472bd2ba8a534ec19ec2c6d0ab07c58ce807 SHA-256: 16af7621520e6213598835d9f16f349733370994edb53637a7a48ddd8188798e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to potentially malicious domains, and ClamAV detected it as a phishing trojan. The ML classifier also strongly indicated maliciousness. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to harmful content, likely for phishing or malware delivery.

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://druttle.ru/aws?utm_term=zee5+app++free+apk PDF link annotation
    • https://cdn.sqhk.co/kutogudofi/gjjbgiW/83097827333.pdfIn PDF document text
    • http://instapodarok.site/11665084917ivnph.pdfIn PDF document text
    • http://pabesubibo.66ghz.com/police_reports_online_california.pdfIn PDF document text
    • https://vatopefo.weebly.com/uploads/1/3/1/3/131398509/fovefejodoluva-govitanox-kusatowulozo-ludumejigukefad.pdfIn PDF document text
    • http://flylovel.com/xam_idea_accountancy_class_12_solutionsfw6z1.pdfIn PDF document text
    • http://dwatches.site/sixekovewukikujenovuk7tbg.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/a7zhd5y/emergency_meeting_sound_file.pdfIn PDF document text
    • http://stav-games.ru/dune_trailer_song_cover4l90k.pdfIn PDF document text
    • http://hangookoil.ru/pbs_kids_games_kart_kingdompsbck.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/1b70fe6e6de9.pdfIn PDF document text
    • http://momentikshop.space/fezejurimmhk7h.pdfIn PDF document text
    • http://nubolutlion.xyz/pubg_hack_version_apk_free_downloadqhd0x.pdfIn PDF document text
    • https://bajupeboxima.weebly.com/uploads/1/3/5/3/135327322/571dff3c84bdc6.pdfIn PDF document text
    • http://gbarb.me/police_scanner_app_for_pcwr4aq.pdfIn PDF document text
    • http://gufutaca1.xyz/81749755766o3vm9.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/cgfPicX/lexameloba.pdfIn PDF document text
    • https://natuxebifenukud.weebly.com/uploads/1/3/1/3/131378868/2016973.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekubegem.epizy.com/3d_landscape_wallpaper.pdfIn PDF document text
    • http://rafubapon.epizy.com/noel_lauren_daigle_sheet_music_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 4832 bytes
SHA-256: 95040238f3108e0f872beb207e89ed33a6836a39bec275a7b6026570e40c0c3e
font_01_sfnt_off0000fc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC40 10092 bytes
SHA-256: afe70bddfc8e392a4957ea752c4750e96e056a253f729e0fc3dc48faaef84846

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