Malicious PDF — malware analysis report

Static analysis result for SHA-256 434690cfa173804a…

MALICIOUS

PDF

83.3 KB Created: 2021-03-15 23:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4edbf1411fe31b421ab4c8fdbdfdc085 SHA-1: 154babaa6674f50cb17804d6e09fe533874d3304 SHA-256: 434690cfa173804aa2c84c43130e11dd84e98a1f77ff4924eeb34a99e64de56b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/123?utm_term=crash+bandicoot+ps3+iso PDF link annotation
    • http://peromopativej.mypressonline.com/92374071051.pdfIn PDF document text
    • https://cdn.sqhk.co/nipumusawobo/ijxjchc/ps4_pro_rebuild_database_time.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/how_to_set_up_a20_headset_xbox_one.pdfIn PDF document text
    • http://com-copyrighit.com/56898891618tzad1.pdfIn PDF document text
    • http://whowill.ru/58102894351c4a7q.pdfIn PDF document text
    • http://vvinorama.fun/internet_speed_meter_pro_apk_2019yvwmw.pdfIn PDF document text
    • https://cdn.sqhk.co/vibefoparo/YhDsjav/dune_buggy_racing_kart.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/icheify/mermaid_photoshop_brushes.pdfIn PDF document text
    • https://cdn.sqhk.co/gedugari/dXGidCe/datasheet_of_power_diode.pdfIn PDF document text
    • http://soldonlakewood.com/2689929531084mtw.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuburi/0ij2gcg/60843009323.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/seduzeron.pdfIn PDF document text
    • http://herss.space/excell_pressure_washer_xr2600_pump2v5k8.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/can_medics_go_to_ranger_school.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/fisulefajow/zapafadoxabalufavar.pdfIn PDF document text
    • http://zibelasavu.atwebpages.com/how_to_install_wireless_pet_fence.pdfIn PDF document text
    • http://mukulug.rf.gd/parkour_maps_for_minecraft.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/ambient_mode_android_watch_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7bec5ca-8bb1-4be1-a9a6-83248e09e7e3/madak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f59d4d-f180-45b6-865d-507742d67bb8/46519737332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a0f011-4fab-4d76-8ec1-4247883c03a3/words_of_power_and_transformation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe84ebf5-7f0b-42f4-89af-406431fd9121/saxadojaben.pdfIn PDF document text
    • http://mupijexejo.rf.gd/how_to_use_a_schwinn_bowflex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908fcf08-c852-4c66-9752-1e1b056303dc/how_to_use_universal_remote_without_codes_ge.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 5340 bytes
SHA-256: c8b506e1e398431481183ff8c1760b26b6e89a5663cb512ddc701e3e4b1aded3
font_01_sfnt_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 11084 bytes
SHA-256: d3779fc0f74b6a7c8e742b1773a800f4da2e423f1f7fe91eb36bfc74d5abebaf
font_02_sfnt_off00012abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABE 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2