Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc105b3b202bbfd5…

MALICIOUS

PDF

80.0 KB Created: 2021-03-16 06:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3c3b31dc172463e490f7986af8525fe SHA-1: 72045828b0cb58208ad0179765363b60bbfab8bc SHA-256: fc105b3b202bbfd56bce1fef45204bc7583819827b7332c80651334dc119fd91
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, but the primary malicious functionality appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://soxebez.ru/aws?utm_term=what+does+palsy+mean+in+the+bible
    • https://static.s123-cdn-static.com/uploads/4413363/normal_5fdf6601cafb8.pdf
    • https://static.s123-cdn-static.com/uploads/4367303/normal_5ff50288d77de.pdf
    • https://gazekusiparisom.weebly.com/uploads/1/3/4/0/134012522/75ea04cf07a0e2.pdf
    • https://cdn.sqhk.co/fudixaxogub/I7mJjhL/dungeon_master_s_guide_5e_anyflip.pdf
    • https://cdn.sqhk.co/temirikuji/ijhZigc/fondant_cake_designs_for_wedding.pdf
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/xijixojaf-xuvonuzomugix.pdf
    • https://cdn-cms.f-static.net/uploads/4412160/normal_600c5820b3955.pdf
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5fdb3f4cd69da.pdf
    • http://zukirudon.mypressonline.com/jepiwi.pdf
    • http://wurilozi.scienceontheweb.net/stp_segmentation_targeting_positioning.pdf
    • https://cdn.sqhk.co/mogizilo/a3pjhgI/reporters_today_contact_number.pdf
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/xamosikil.pdf
    • https://cdn-cms.f-static.net/uploads/4367624/normal_603e2b697eb7f.pdf
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/7421855.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_78f2047d9af440cab97a6a00881d0ed1.pdf?index=true
    • http://juludiripo.myartsonline.com/how_to_reset_scytek_car_alarm.pdf
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_307509c9c8964971995a382f7b06a6d2.pdf?index=true
    • http://tofilijewok.atwebpages.com/autocad_electrical_tutorial_bangla.pdf
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_78a98ab3d055405a924351b9d957ea94.pdf?index=true
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_5488e3d2e07742ad973de78816d83b58.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4091664a-745f-4a4d-a641-1cca5fcb44de/gekejitereriwenekufaxapo.pdf
    • https://uploads.strikinglycdn.com/files/56cc30fb-e8d7-4336-ba37-4ceae926711b/john_grisham_latest_novel.pdf
    • http://tafiwepamubov.atwebpages.com/98784051743.pdf
    • https://uploads.strikinglycdn.com/files/ee5c260c-375b-46af-acc9-813934909136/53165676096.pdf
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_c1189e3c1ae6442f8b2fb25bd58c5edc.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f630.bin
fd4721aaacc720fba4cb6d89fe4ccaf306b2619bef57385389960a28e020a9ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF630 5356 bytes
font_01_sfnt_off00010850.bin
ecabd9daa0d06d57c1348befc2409831abdf615832d47f1447a2d78901b586b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10850 12720 bytes

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