Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd26d7a4e5ec4c1…

MALICIOUS

PDF

74.7 KB Created: 2021-05-19 15:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: def7ad6093a846fccb06c909152a2c4e SHA-1: 29b0e06c56a9dc33829837308bbf1487e684ce50 SHA-256: 8bd26d7a4e5ec4c1a0261e5fa7aa90be9d1bbe41a9eda60ef45cf4f71c1b0614
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it is part of a link farm or phishing operation. The primary URL, https://soxebez.ru/strik, is likely used to deliver a second-stage payload or redirect to a phishing site.

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 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.
  • 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/strik?utm_term=2016+malibu+maintenance+schedule PDF link annotation
    • https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/3566145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_601ad386abb9f.pdfIn PDF document text
    • https://fogasofimoxor.weebly.com/uploads/1/3/1/0/131071298/lixopixonimud-guginowonorifep-zugepuvogep-jolam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394072/normal_5fde77e4f3b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_5fe63bf56ef8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_603918cbe7b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_5fd9add02f8a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475997/normal_601ac459ba316.pdfIn PDF document text
    • https://warexuzema.weebly.com/uploads/1/3/4/6/134601764/340f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465400/normal_601a2a5c8a2a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450501/normal_600b5de0b954d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5fc9a3615a1b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a422b8a-adf7-4a7a-9d7e-7e1cdc574097/operations_management_11th_edition_heizer_and_render_pearson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97cac1d7-8cd8-4ef9-bfbf-0328a03f0545/42198394950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4feb8a9-a2c2-4f90-9747-625194c5acbe/how_to_fix_tv_audio_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a141b99-5252-4d54-89f3-3f671dfbe33c/fejematikamoponap.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/hill_rom_careassist_bed_alarm.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/wujibikodifejevefexod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4466790-9a07-4b59-b41b-339a4ac26ce7/99962233720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee52de3-71e1-4878-81ff-679b6266ff64/how_to_change_battery_in_kidde_wired_smoke_alarm.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/xazisete.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/martin_luther_king_jr_speech_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a340302c-1933-46ea-a00d-97d055656a75/what_is_a_static_budget_variance.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/with_cat_like_tread.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_off0000e5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F0 5608 bytes
SHA-256: a9b18baedf0fce9dca0f9349c43bed787ddcade6352b0ef6ef7b838296b509d0
font_01_sfnt_off0000f8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D5 10256 bytes
SHA-256: 92a283e5007f1baa6c9e89a95b93f7fd6872b85fde77489325fa3fc403a37e64

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