Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cc4a05e92d1805…

MALICIOUS

PDF

84.4 KB Created: 2021-04-02 07:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e00638c8b1606d272d6a10c74b603596 SHA-1: 5cdaf2d312569d7400550818d43c403b69acd852 SHA-256: 37cc4a05e92d1805a5cb4c1130aed9eac46d6ef245f7a53cdc1601a7868831f3
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous external URLs, including suspicious domains like jumiwimov.ru and hookup154.space, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'star wars novels canon', likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/strik?utm_term=best+star+wars+novels+canon PDF link annotation
    • http://hookup154.space/196838137043hjxn.pdfIn PDF document text
    • http://micrometer25bill.site/calcium_oxalate_formation_equationb8uwu.pdfIn PDF document text
    • https://revowuveku.weebly.com/uploads/1/3/2/6/132683267/latoboferosububew.pdfIn PDF document text
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/8d83b758d7d808.pdfIn PDF document text
    • https://nezivubu.weebly.com/uploads/1/3/1/3/131384481/e8b100b.pdfIn PDF document text
    • http://d-youtube.com/xafokubamitedinasere7yjg.pdfIn PDF document text
    • http://toppiksnack.xyz/30515211047jgqwz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://deed868a-3c3f-4b0d-b3ae-f9ebe8a38c33.filesusr.com/ugd/95283b_18de6ab0cc704af591043582d9691d5a.pdf?index=trueIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_d0dce1f72abf460f9b4672b0766aa47f.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_bb43f489d9e24d089ae3940a07c91575.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3d72fe3-39da-4346-a085-c0a8fdbc86e0/xisovevalurum.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_571178a05aaf4a8a9e1ae8925e4598de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2b5cfe-36d5-4209-9ae3-09461f671e53/fejuwuwewirupob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f716362-2f44-46b5-bf30-89e720ee880a/wonifudil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c05e08-a8ea-4d02-a163-f53383543ba2/what_are_the_times_for_the_stock_market.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_ae36b52d9cf64ab497626fcb274c9e29.pdf?index=trueIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_95c08a49e8254e6fb737822c8ac56324.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b517d43-1361-430f-9619-965c25f3a209/can_you_share_a_photo_album_on_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ff79c8-c0eb-42c3-8ad9-558ae4ee4ba4/attack_on_titan_season_4_episode_7_manga_chapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0a61a8-ed63-4773-b373-0a10cb748145/whirlpool_duet_front_load_washer_parts.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_4155a02d04e443e8aa4f8616489b7b58.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_off00010cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 4992 bytes
SHA-256: 55fb1b6c4684c7e338877abedfe58030cec5d1944d7cebf68175585628e53ab8
font_01_sfnt_off00011deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEB 10848 bytes
SHA-256: 960396e5e006dd27ab40f254199e40f3537face3fb614bf27295a98ed1535752