Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2500a375d307c7…

MALICIOUS

PDF

76.1 KB Created: 2021-03-22 22:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 20571f4b661491935dcdb86e6eaf5846 SHA-1: ec8a9004aa2cc0e7d6c2b8f30c26ab686c0200ab SHA-256: 8b2500a375d307c73a953efbd24c3b8cd4fc1ab28653dfbe6af9225ba66ba74c
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary external URI pointing to a link farm on disposable hosting, likely intended to redirect users to malicious sites. The document body, though partially garbled, suggests a lure related to tipping tour guides, which is a common tactic for phishing or scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/123?utm_term=how+much+to+tip+vietnam+tour+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413347/normal_601bb3774021b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_6029719b61377.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418556/normal_5ff23b8e12b81.pdfIn PDF document text
    • http://rikaseligexodiz.22web.org/zebilozunexene.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/MifsyK9/69357572852.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402517/normal_5fccc0c694963.pdfIn PDF document text
    • http://wersita.space/92499244190mkypt.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/emEijid/ruxedomalerokelujotajewut.pdfIn PDF document text
    • http://7gusevshop.website/bsf_bharti_online_form_date_2018btaeb.pdfIn PDF document text
    • http://agent-ritual495.online/auctiontime_results_trucksi1ngt.pdfIn PDF document text
    • https://cdn.sqhk.co/woravejafeto/o57hahb/43892374385.pdfIn PDF document text
    • http://shoop-fl.ru/xoruxajanamidomotazafvtiv.pdfIn PDF document text
    • http://buytoday.cc/how_to_make_your_own_google_cardboard_vreykj7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://finuzajobozosom.epizy.com/eq_p99_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e7d117-2e37-43b0-bee1-5e6c6a7af74c/zizixefetodopuxukaged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2489192c-2ea6-470f-8e5f-e161ae850ac4/gazipivukotiniverifema.pdfIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_6147061e22834a22bb0f1517ae1f9193.pdf?index=trueIn PDF document text
    • http://talakukatutevib.epizy.com/49210469785.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_7c8e82d66f374d76a1d79503530e63b8.pdf?index=trueIn PDF document text
    • http://rizusuzapil.rf.gd/78876817955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8acd3eea-b5d8-4331-937a-eb676babeac7/79992741275.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_45caaf06282c4c3b9eccc8407924ce84.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_off0000eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 5392 bytes
SHA-256: 2e6be8c2ac7d7001d3e2eb97d83ccdb607a827d8f9c5aa0305668dab70c94407
font_01_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 11108 bytes
SHA-256: c5d808284383a1604bcab07c80ae0e5b55db10e4897973e2c8f78bf61a37bf69

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