Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cff8f30625ed539…

MALICIOUS

PDF

77.0 KB Created: 2021-05-12 04:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cccb097bbb723f19ffa75e3962466d42 SHA-1: 12c3282d7563a63f5aea9ea5a7d9f460a5057d8f SHA-256: 9cff8f30625ed5393705147d81c344303efaaa353fbcfdd14cca30234365f39b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains a large number of external links, suggesting it's part of a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to a 'Harry Potter quiz', likely a lure to engage the user and encourage interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=harry+potter+quiz+hardest+in+the+world
    • http://bossyonlinex.com/ebook_muqaddimah_ibnu_khaldunimsfr.pdf
    • http://robolab.one/odd_eyes_magician_deck_legacy_of_the_duelistrsnfb.pdf
    • http://jotafitosixa.getenjoyment.net/bryophytes_life_cycle.pdf
    • http://kigumelez.medianewsonline.com/tirikirejofolirixujelitu.pdf
    • https://fazokovonopa.weebly.com/uploads/1/3/5/3/135329702/xonizaziliraxu-vefosome-mutotitavifoxej.pdf
    • https://pagurewitapusak.weebly.com/uploads/1/3/4/6/134632053/gevirimibulogeru.pdf
    • http://verifybadgesbusiness.com/consumer_reports_best_refrigerator_202074l36.pdf
    • http://tryadasert.online/amsco_apush_20185x4i9.pdf
    • https://xodozevonewoze.weebly.com/uploads/1/3/1/3/131384462/ronutare-katotorilub-regijonasurevob.pdf
    • http://ladyso.ru/22780836462b9pre.pdf
    • http://tuwasukam.getenjoyment.net/dekonew.pdf
    • http://nigavereke.mygamesonline.org/arithmetic_and_geometric_sequence_formulas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_e25e74503b53451fa42a78dcf3d51129.pdf?index=true
    • http://filutapokupa.epizy.com/2814024918.pdf
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_272391d2724a4b419f528aaf433c32ee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4fc34a25-ed0a-411a-a173-fa9c30ac3f77/bizurusaxonika.pdf
    • https://b0b89e74-75d6-43b0-bb8f-fa2cd9bd5f5b.filesusr.com/ugd/b5ae3e_2bf85f7d78484e8687000abd04d0a17d.pdf?index=true
    • http://lijomoxanegug.rf.gd/nematodes_notes.pdf
    • https://uploads.strikinglycdn.com/files/b15bbe1c-81f3-497c-8999-a49e8fc786c2/nijukukipad.pdf
    • http://lejiletuvasipib.onlinewebshop.net/resijijifowovamopu.pdf
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_187d92684ac341239ba6b6323eb9a709.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6c.bin
23c6b27fad8768a64678eda138a13ec057158b917d572d8a5e4096ce4c074438		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6C 5376 bytes
font_01_sfnt_off0000ffca.bin
e9cccd480e150f60ea666edc830aa4732042e7144e33e0c775b2db42850b29eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 11396 bytes

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