Malicious PDF — malware analysis report

Static analysis result for SHA-256 f082acae3c5c9631…

MALICIOUS

PDF

71.4 KB Created: 2021-03-05 01:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d2f2be66810121bbe1788fbcbd8612e5 SHA-1: 276ccebc01ca5a6ffa1eb61358f066ce5a7f9816 SHA-256: f082acae3c5c9631977702d004f31038ba16f7b9c90fbeaf0c9fff5afd94ce79
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://seumenha.ru/wix?keyword=chapter+41+animal+nutrition+reading+guide+answer+key PDF link annotation
    • https://cdn.sqhk.co/xetasenuwoji/ghhjuhc/46246778137.pdfIn PDF document text
    • http://xenifizonuk.22web.org/8731695151.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/dibjb8j/best_use_of_gems_hero_wars.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/vhjg3gg/15376646360.pdfIn PDF document text
    • http://zabodolodak.iblogger.org/sage_accounting_training_manual.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/8b01a372-039e-4cde-9c7e-681269ccd8fd/lukotapexez.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_d277092b14644f9a9f721326b36a137e.pdf?index=trueIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_a0f2c07bc529456289408fada6baa3e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ab5b9b-f37b-4066-88ea-dde45abdb8ea/jofodo.pdfIn PDF document text
    • http://gavoditi.epizy.com/42573660833.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_3d7a1f187c964a078b504217d7fdf836.pdf?index=trueIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_0770d7626c774e1c81af8ff727115a5c.pdf?index=trueIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_da80c316fbfa45799184e6af5ca9a227.pdf?index=trueIn PDF document text
    • http://ruvowepager.epizy.com/ozeri_touch_total_body_bath_scale_reviews.pdfIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_bc9e06b0bc4e4564bb8d4206ae049f9b.pdf?index=trueIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_62cfdffbb7514d5ebd163e26f9db0100.pdf?index=trueIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_f9521381958b48b3bcda4dd0b5286974.pdf?index=trueIn PDF document text
    • http://xorikija.epizy.com/bold_text_span_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d585053-9131-43b5-a897-3e0742302cf0/wonder_rj_palacio_book_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b0ca57-d22f-4101-b1f5-bb20cc6080de/148536897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54cdcf20-3708-4c27-b4e6-6ca919953c1d/66191384709.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_9d1a2d4a71d540b98019ab1c68168ae6.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_a9a1a38cffc9402f98daa904c16981b9.pdf?index=trueIn 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_off0000d983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD983 5676 bytes
SHA-256: 7fcea03a1b79b41af879ef1b68c7757866b5d967ed6e8afa1ce5b6154f3b9259
font_01_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 10240 bytes
SHA-256: fcef307e1a6b3c2e0cb1657b74c19cebe8699556c8eac5f53f47e501b6c93c39

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