Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d833c3cfcc55cb…

MALICIOUS

PDF

74.2 KB Created: 2021-03-20 08:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bbcee113df9ab861536c607245b4e1de SHA-1: 8ca991280636afdec77964213d3c5e952551bb38 SHA-256: d7d833c3cfcc55cbddc86b6f82051c63b1a7e3e313b26a52e6a06ec7b3031dcf
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 0.9998

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://fokemale.ru/strik?utm_term=black+and+decker+toaster+oven+manual+to1700sg PDF link annotation
    • http://onlinetiser.website/how_to_win_at_the_sport_of_business_mark_cuban9op3h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_602dca6b1c064.pdfIn PDF document text
    • http://debegezuvume.iblogger.org/vfr_flight_plan_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449004/normal_5ff90a203a54c.pdfIn PDF document text
    • http://arm-watch1.club/4723300868759dov.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/how_to_use_apple_watch_for_marathonnmedx.pdfIn PDF document text
    • http://cybety.xyz/winewawixawenipimeje1fr.pdfIn PDF document text
    • http://bilkan.fun/combinations_and_permutations_questions_and_answersgzsd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_5e7bde030ef24b7481f67154ee3920d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fapaga/grief_and_loss_journal.pdfIn PDF document text
    • http://fadakivok.rf.gd/fortify_rights_kachin_report.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_02eb609e98ec415b8dec8036de81e9e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c70f17-f06f-4411-9edf-4b810ac772c1/how_to_calculate_sedimentary_rock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e2f94b-e145-4e39-a061-87ba6c688bbb/rujafixiruxapifuzopep.pdfIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_b152f68d7c3f4b3680fda61cc4ad03b9.pdf?index=trueIn PDF document text
    • http://kifasonow.rf.gd/basafivotikakipipoxiril.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/fibasopupunugibekerexufi.pdfIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_734104cac2254214975b3d9ff4334f67.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d62ac41-f9d8-4736-a45c-d6218be29dcb/how_to_use_bluetooth_on_polk_soundbar.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_off0000e307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE307 5704 bytes
SHA-256: a7f637faf206958abae3ef44d131f10b8a239c46fcc6002b3601e13c44386b34
font_01_sfnt_off0000f66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66E 10840 bytes
SHA-256: b1a18dd7f32b1bfb1f5723e6bc877d4a4773c6846a9f77fe200dd0d687b91d9d

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