Malicious PDF — malware analysis report

Static analysis result for SHA-256 cddacbb9566f179b…

MALICIOUS

PDF

79.1 KB Created: 2021-03-09 11:59:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6431a334bae2d79c1cf0da7642c8f9b4 SHA-1: bd8fca534935e190f9847ee6555f9cdc0d59ec98 SHA-256: cddacbb9566f179bf1eb8c14ad40ffda32ee6d38eaf3c8b865845c2aec7e8446
126 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and potentially malicious content, suggesting an attempt to redirect users to phishing or malware distribution sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, likely to obscure the true malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://pelibifir.ru/award?keyword=pulse+rate+definition+pdf PDF link annotation
    • http://lorakuze.sportsontheweb.net/factoring_polynomials_puzzle.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/nufuxunedules.pdfIn PDF document text
    • http://lifelalulenomip.mygamesonline.org/41669120637.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/jgahdDq/kim_kardashian_hollywood_game_energy_cheat.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/asus_rt_n12_wireless_n_router_access_point.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/replacement_remote_for_magnavox_dvd_player.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/fofitakadikuvobitopop.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/hjaRVOR/31339935966.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/jimemetozovuginibe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5fc80bdbcc365.pdfIn PDF document text
    • http://takaweri.mywebcommunity.org/6670769034.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406169/normal_5fcd606e5754a.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/kebotopelokom.pdfIn PDF document text
    • https://cdn.sqhk.co/jumosanex/iMKjeih/score_hero_match_339.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/significa_soberbia_en_la_biblia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ebbb41b5-b8b7-4bfc-9e1b-23e79ad93844.filesusr.com/ugd/5eba67_9769a9c117a34bcb8798ddf9f5ea01b5.pdf?index=trueIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_39b974368c6e4669bc0402ffb413f58b.pdf?index=trueIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_868e27cbaec24ff38b29f3dd1b2a4da9.pdf?index=trueIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_f5b31d3059dd46599696d91d14fcd0af.pdf?index=trueIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_c9a28dcf860b4629bc9aeb6a87f5116e.pdf?index=trueIn PDF document text
    • http://mawokale.myartsonline.com/convert_byte_array_to_string_java.pdfIn PDF document text
    • http://samesesodore.onlinewebshop.net/why_is_my_router_internet_light_red.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_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 5036 bytes
SHA-256: 8412c58cd4006eb6f989cd753a5e454a22d7d87ca93cd8d5c629d134a347b7e5
font_01_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 10356 bytes
SHA-256: f6c102ec5391657ba26b4f4a7e52832f11945344b0997fba31b847ab14405b8d

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