Malicious PDF — malware analysis report

Static analysis result for SHA-256 360607bbdece9245…

MALICIOUS

PDF

79.5 KB Created: 2021-04-15 08:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1c9a1b7bbb8fb377c2b5f9593506beb7 SHA-1: d1758528fb6e480e831e17041eb260b567f0ed20 SHA-256: 360607bbdece92450a2ac96bd78a84772e00b996df3ac59c3b8331b439aa3e74
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is likely used to host malicious content or redirect users to a phishing site. The PDF's structure and embedded links suggest an attempt to trick users into clicking through to a harmful destination.

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://pelibifir.ru/strik?utm_term=fire+and+ice+by+robert+frost+meaning PDF link annotation
    • http://pipazodonuwadu.iblogger.org/gateway_b2_workbook_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_60539f3f0b78c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481400/normal_606711fa18c0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450896/normal_5fef943780478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_606e3d385a9ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480408/normal_606e5dab0113a.pdfIn PDF document text
    • http://gixuloponij.mygamesonline.org/canine_parvovirus_treatment.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/warhammer_40k_tyranid_codex_download.pdfIn PDF document text
    • http://ruvetimoroneb.iblogger.org/59616016172.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a53fcf70-04dc-468c-b16b-91f20e80c8bc/88937646561.pdfIn PDF document text
    • http://kofepiropi.onlinewebshop.net/45079062088.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/kodabegevafid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d5703c-2689-4b2d-9b08-5345072cfc61/experimental_particle_physics_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6adc75-e294-46ce-a111-772f6a4ab628/roku_3_sd_card_not_detected.pdfIn PDF document text
    • http://nakobebujem.epizy.com/pirifijuxavezekanumifif.pdfIn PDF document text
    • http://javewexo.epizy.com/present_simple_adverbs_of_frequency_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052f126d-961c-4407-8b2d-60435defbfde/fl_studio_12_plugins_pack_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/free_cad_viewer_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/18340463186.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/kegoruwovozamajiku.pdfIn PDF document text
    • http://vedapasu.epizy.com/how_to_log_into_my_live_email_account.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/kenmore_elite_dryer_thermal_fuse_lowes.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_off0000fa75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 5508 bytes
SHA-256: 6d7db368e39757fa60257f4b14dcea948f638199a75a5f0e24da7001dfe9052e
font_01_sfnt_off00010d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D25 10568 bytes
SHA-256: aa991b827e1601646aabf2d352665fbcd0ae6a72eeacb54c1db7911c8c6a405d

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