Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5174f1a72021ff…

MALICIOUS

PDF

82.2 KB Created: 2021-04-23 02:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6ae37f6256d17ca9b0222e48ce4465c7 SHA-1: 93e3bf8d5a69c06c31f01eb6c0744c162c1b03c8 SHA-256: ff5174f1a72021ff1f186d248d70a0e16d515fe324ed94da254cbb21f4d314a7
164 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/strik?utm_term=d%2526d+spellbook+cards+deck+%2528martial+powers+and+races%2529+pdf PDF link annotation
    • http://xanevejesofag.mygamesonline.org/advantages_of_partnership_sourcing.pdfIn PDF document text
    • http://prizinsta365.website/percy_jackson_and_the_lightning_thief_book_coverh60yg.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/comment_donner_des_cours_d_alphabtisation.pdfIn PDF document text
    • https://nutakiderovex.weebly.com/uploads/1/3/4/6/134622867/tetasex.pdfIn PDF document text
    • http://goldstein.capital/troy_bilt_string_trimmer_jumpstartqqr4t.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/wudusodukexusi.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/tanewatume-watikakebozob.pdfIn PDF document text
    • http://mukuwasoveta.sportsontheweb.net/binsey_poplars.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/reading_minds_through_body_language.pdfIn PDF document text
    • http://rating-bookmaker.ru/mergers_and_acquisitions_for_dummiespb1s0.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/bcom_1st_year_economics_notes_in_hindi8qhr8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tisegovofu/jeppesen_general_textbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/diabetic_nephropathy_pregnancy_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/telugu_ringtones_bhakti.pdfIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_2570e8f956bc4bac8a157c0b4a55cd9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemazun/45094157338.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_9b7552a710e84cf48730c0c89cfbef45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugumeb/37629349897.pdfIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_fbe65780788548f7a0d8d01f957d6307.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/purizagep.pdfIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_c72fce868b634693aeabcbba7ea6e1fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/papuja/90431888779.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_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 3484 bytes
SHA-256: 866fd8f85cd0130a59e26d5d2ef72782554194052287c2ce3d346dbb443db71f
font_01_sfnt_off00010631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 11808 bytes
SHA-256: c719bdd3cb681417d569773ddcfbe7433b770b2c9c6c10b7eac1833785926c94
font_02_sfnt_off00012d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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