Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10e8eecc9ebb73d…

MALICIOUS

PDF

73.6 KB Created: 2021-03-06 11:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 47da1a5b37c7814d4765d94b817fc69a SHA-1: 1bca3ecb4c315dd16b10ae870b7544aa2c46643b SHA-256: f10e8eecc9ebb73d98371fc90d46d4928fdfb518f0ff4591f3e902ac773e1aa2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate maliciousness, with the 'SE_CALLBACK_LURE' heuristic specifically pointing to a callback phishing or tech-support scam. The document body, though heavily obfuscated, contains references to legal terms and application metadata, suggesting a lure document. The presence of numerous external URIs, many hosted on disposable domains, further supports the phishing and potential payload delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/strik?utm_term=what+does+termination+mean+in+lawsuit+worth PDF link annotation
    • http://usesucre.pro/46176241376lj7du.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_60241ab3245ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_602638d4e8570.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409813/normal_5ff711cb3d125.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370541/normal_5fe0326223d27.pdfIn PDF document text
    • http://nerroba.info/the_other_olympic_sport_in_rio_swipingy1ngy.pdfIn PDF document text
    • http://construt.site/bd_passport_application_formnekqf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448718/normal_602e4cb71859a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463287/normal_5fca55e46b0bd.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/nuxulikiwab/upcoming_cookbooks_2020_uk.pdfIn PDF document text
    • http://pavitekoruw.rf.gd/bafakosamoral.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/dropbox_paper_excel_sheet.pdfIn PDF document text
    • http://badakun.rf.gd/53251069672.pdfIn PDF document text
    • http://nadiripu.epizy.com/brother_and_sister_song_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d217dfc-011d-4a13-94ba-99925331dbb0/92232003201.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/chandrasekharan_analytic_number_theory.pdfIn PDF document text
    • http://juvojifexuf.epizy.com/lake_charles_louisiana_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f71306-8f2e-49f0-8c94-a0e516d98a80/the_walking_dead_comic_issue_117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eddf17c-d6f7-4c7a-bf97-90ac10083e1e/46122371447.pdfIn PDF document text
    • http://sofikej.rf.gd/3312487403.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_off0000e3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 5172 bytes
SHA-256: 6ce59d4bc194970c0e130b1eb798ab33480adaf140c569d69e56a9599dfd3d48
font_01_sfnt_off0000f564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF564 10396 bytes
SHA-256: 14b62427a1f0243319ae972d30a5529b1901250aef8e31d681b959f39e9a990a

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