Malicious PDF — malware analysis report

Static analysis result for SHA-256 99dc0351db5415e4…

MALICIOUS

PDF

83.7 KB Created: 2021-04-07 00:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b2d10faec13757aae1164ab11fdcd0b4 SHA-1: e0a0c990005f8aa78d11dbc85bc7ad7332275c77 SHA-256: 99dc0351db5415e4d7ed7a7d2f4b291d21327170054c7027713d5548962b0669
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains and acting as a link farm. Heuristics indicate this is a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

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 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://midufefew.ru/wix?keyword=livecareer+online+resume+builder PDF link annotation
    • http://pribor-poverka.site/gikumusulelobozgmim.pdfIn PDF document text
    • https://ketawajizaw.weebly.com/uploads/1/3/4/5/134528489/4448920.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/the_secret_rhonda_byrne_movie_trailer.pdfIn PDF document text
    • https://koredude.weebly.com/uploads/1/3/1/4/131406285/8ca48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367294/normal_5fe23a0f2d233.pdfIn PDF document text
    • http://kopaburak.sportsontheweb.net/good_hygienic_practices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_601868d6dcc1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_601c7e7fac75b.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/vorudujutekotatubezo5xl8p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5fd5f1fce9943.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391636/normal_5ffec1b8e9107.pdfIn PDF document text
    • http://lozhobelir.space/64907112771bnw3o.pdfIn PDF document text
    • http://shtancircul.site/pokemon_xy_3ds_download_citraho37h.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/dowesitobuga/hearthstone_conjurer_mage_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbcabad4-9cbf-4726-9905-ff094cb11f6e/how_to_order_a_jitterbug_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d24d56e-8f14-4594-ae00-12abcf4dd007/psalm_23_rod_and_staff_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/moment_format_current_date_time.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/1487447288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d05e1a-5ee5-43db-9116-df69c96d18bf/dale_earnhardt_sr_mini_helmet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/gadarujajokiwofol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c428fca-2a71-46cf-9ded-227d9b85d2b9/citizen_eco_drive_world_perpetual_set_time.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_off0001089c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089C 5224 bytes
SHA-256: ae2fce0195bda1a7cb56a01440adb08363370673fb6b339293b8d7f866f139cb
font_01_sfnt_off00011a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A51 11660 bytes
SHA-256: b4805abfea4cfdf2ec454f6150a52e6d20d9f206d6f872b5526bae7a97e8ecf3

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