Malicious PDF — malware analysis report

Static analysis result for SHA-256 6727b6af8eadf57e…

MALICIOUS

PDF

85.8 KB Created: 2021-03-19 06:39:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: efcba30ddad4bb203df61e0c6fa6c5d7 SHA-1: 93779a3f45b77153acc75971c8dcd4dbecca42ce SHA-256: 6727b6af8eadf57eee4357081317af7337f5f2efeff44022b672b7341b673e70
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://midufefew.ru/wix?keyword=fallout+3+special+guide PDF link annotation
    • http://fb-ig-copyright.com/sector_14_gurgaon_markettfeyp.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/32411298028.pdfIn PDF document text
    • http://idealslimitaly.site/3341879796fle0r.pdfIn PDF document text
    • https://guzuwifaxad.weebly.com/uploads/1/3/4/0/134096987/jimetodoti.pdfIn PDF document text
    • http://mif-smeh.space/27133110962fwqpw.pdfIn PDF document text
    • http://tanivikovome.sportsontheweb.net/berad.pdfIn PDF document text
    • http://buytoday.cc/is_cyberpunk_on_ps4_fixedvhk4k.pdfIn PDF document text
    • https://topasotasakaro.weebly.com/uploads/1/3/0/8/130874498/088e5e365e32b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_91f80fb97a7443009d24205b5ec98bb9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/63799527-c2b0-4e45-a128-5c0389d594c1/how_do_i_reset_my_dstv_remote_control.pdfIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_1ffc828c94fc4c32b43f3f39b2d62998.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sevoga/aeroponics_research_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc842d82-7387-4ae8-bb2e-6a1b67522e80/jugukonajezupade.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/example_health_history_form_filled_out.pdfIn PDF document text
    • https://ce419959-236d-4487-89d7-67f356bda573.filesusr.com/ugd/147b51_c7c1921a74f44066ae3fdebab07613c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/48153480603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e159871-9333-4ef0-a1f3-aced4b7c8d98/what_is_todays_julian_date.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_e7c63511ae24415e92007fed13d3f6c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d7e0a0-3f80-4426-b51a-5a0040f9f583/xukigome.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/fipodofaguzewimuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46518b30-68b3-4b8e-a22f-9a37115d20e7/the_trials_of_apollo_book_1_characters.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FC 3252 bytes
SHA-256: 03faabc9309b6203ae7e6322de379889e615704bbd9e4626f85c2bd8f6c01ce5
font_01_sfnt_off000110c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C0 5264 bytes
SHA-256: 4f75719508c5b8d59b89e428a77a3da41940e4b730c2f196dcdfaa0dd7e7fb57
font_02_sfnt_off000122bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BD 11492 bytes
SHA-256: fe180c5df5e7ae6dea656a52cee434747d98741882cde785da6095c9274e628f

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