Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb6576bb193223d…

MALICIOUS

PDF

115.7 KB Created: 2021-03-01 05:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c5e173fcfb327198c1fffe92d0358493 SHA-1: afa14a13a446ab31229abef8c9a2f2115ddce2d5 SHA-256: 8bb6576bb193223d4d0f70cac65faef6204bc2f1fc494c0a942e5cd7312c0bb9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to changing Comcast remote settings, serving as a lure to direct users to the malicious URLs.

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://midufefew.ru/123?utm_term=how+to+change+hdmi+on+comcast+remote PDF link annotation
    • https://cdn.sqhk.co/farukisinu/gdxhhjj/73533447756.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/iiciihc/cute_cat_hd_images_free_download.pdfIn PDF document text
    • http://interbankdigital.com/projectlibre_user_manualc1txr.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/JghJZHE/2875829274.pdfIn PDF document text
    • https://cdn.sqhk.co/tubozejo/ie22Mid/14596274711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468572/normal_600e656fe519a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450511/normal_6038fa20a4f88.pdfIn PDF document text
    • https://cdn.sqhk.co/karelevo/HijsHgj/86422134097.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5fc5d484848f5.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/0ig9VqP/tasty_world_kitchen_tycoon_burger_cooking_game.pdfIn PDF document text
    • https://cdn.sqhk.co/rasirise/haJjfhi/raft_mod_mcpe_mapa_skin_aptoide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxumodud.epizy.com/adobe_premiere_pro_freeze_last_frame.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/big_sean_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/lockout_tagout_procedure_template_free.pdfIn PDF document text
    • http://kifofok.epizy.com/rovopoxujaz.pdfIn PDF document text
    • http://wesovipimamino.epizy.com/cisco_ise_radius_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/beiimaan_love_movie_songs_free.pdfIn PDF document text
    • http://vilujemes.rf.gd/shark_navigator_lift-away_xl_upright_vacuum_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/apollo_18_full_movie_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018bea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BEA 5372 bytes
SHA-256: 9cbbd3437ee0ab452d1b349b91132c4eefb89c557a9c50d447241bc668b76ddb
font_01_sfnt_off00019e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E15 10412 bytes
SHA-256: 595f8c279b994f992df4dd2422b0ee17395502bcf5e7d7cd85ef132bed485bf6

Open this report in the interactive analyzer, or submit your own file for analysis.