Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fdfed2c4311ccf…

MALICIOUS

PDF

103.2 KB Created: 2021-03-05 03:31:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f3b458b9cca641d6ce1bf38f817642cd SHA-1: 69d0c2dbfeaea07e5d7ca8eefef0ed564fce1bba SHA-256: d5fdfed2c4311ccf4e2703092ac598fe3b0f1e749572f2504d81dc1fe0b33fa9
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure for downloading a PDF, which is likely a pretext for delivering a second-stage payload or conducting a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://lozipotod.ru/aws?utm_term=descargar+la+biblia+de+nuestro+pueblo+pdf PDF link annotation
    • https://cdn.sqhk.co/vebiziwob/ghe9Khi/hmrc_grant_for_self_employed.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/1vghhhn/intelligent_personal_assistant_in_apple.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_5fd13906f1025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_603115525d349.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/gh9QhaS/the_silent_age_walkthrough_episode_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5ffd3f0ca9148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5ff66c53628fc.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/bjcqQW1/the_farmhouse_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/dygiwha/stickman_the_flash_mod_apk_unlocked_weapons.pdfIn PDF document text
    • https://cdn.sqhk.co/rodoruwuwab/cm8hcsW/virovovutezetudam.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/iZKgk8W/marshmello_fortnite_concert_dj_hoodie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_5fe48bfec7f90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_603ff894da7fe.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/ijjhirc/datesitilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462730/normal_5ff281435928d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_6006a262530ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_ffd46d529cff48a3b14d83091592c703.pdf?index=trueIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_773e96daa0f94974ac9de144e17d3d7a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/music_2019_gqom.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_d7a5767d786d4505afa496a7b7dc3d43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/fojokopibusikageparivid.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/71165589463.pdfIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_5a273a1980fa42d5ac23ae340dd4bd8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mizeteb/bass_booster_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/fusawesekatupo.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_21f537173a7049db929ef471a4cd0736.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001401d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1401D 5344 bytes
SHA-256: b987af26ac5106f31ca59228fb3d49c6bb3f2f9919e2266a511722138f298d7e
font_01_sfnt_off0001524e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1524E 14432 bytes
SHA-256: 399d147aa678006ba09ce497587dd91f1ccd8cc709d4ac6015c33c02b74f8a1c
font_02_sfnt_off00017ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EE4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333