Malicious PDF — malware analysis report

Static analysis result for SHA-256 90bb175aea58147b…

MALICIOUS

PDF

74.7 KB Created: 2021-01-31 14:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 1dda3cdb00da0e13908b00f10492d078 SHA-1: a7494beaa9fb3b3c49162a1a6660c316661f893d SHA-256: 90bb175aea58147b4f453ccc786147583c7edc6776661f3ce071c20ccac1471a
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://crophysi.ru/aws?utm_term=reporting+intimidation+at+work In PDF document text
    • https://cdn.sqhk.co/kemomonil/Paiibge/change_my_voice_recognition.pdfIn PDF document text
    • https://cdn.sqhk.co/tazurusubiz/jetzPgi/rock_band_guitar_hero_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/michehj/halloween_decorations_indoor_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dowotovewi/gehgdDD/47829448900.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/1jehfQi/dafenefurusumigu.pdfIn PDF document text
    • http://shopwithsale.website/code_128_barcode_generator_for_crystal_reportswpaol.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/20icPN9/38205040378.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/dxZjhVh/5604767139.pdfIn PDF document text
    • https://bunavomotuta.weebly.com/uploads/1/3/4/6/134606544/jovisawudiwukafob.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/PiihAhd/assistant_project_manager_jobs_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/vevodusoxif/Yihhfd4/neon_gamer_pokemon.pdfIn PDF document text
    • http://frontglass.xyz/45279007952hxi7t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/jardiance_patient_assistance_income_guidelines.pdfIn PDF document text
    • http://mufifofoge.epizy.com/american_hustle_parents_guide.pdfIn PDF document text
    • http://zifasodokid.epizy.com/29745833548.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_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 5232 bytes
SHA-256: b4a94c72b05a48eb5dcc957c6c6df25da7ba791c7a7bab7aab4db9165dc30a9e
font_01_sfnt_off0000fa35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA35 10560 bytes
SHA-256: 4a73d44becd564a229e47290e8bd2293a95f34d15115716e4457cc4085dbabd7

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