Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c08072d12fa761…

MALICIOUS

PDF

73.8 KB Created: 2021-03-07 22:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 303552054d1fb10927d31da851022aa6 SHA-1: a964933994c8ad9232f186e0d93352296c4ef602 SHA-256: e9c08072d12fa76103d5914165481d26dd0e1994426b9641411a713d100568e9
154 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains or link farms, suggesting a phishing or malicious redirection attempt. The presence of a 'download button' lure and callback phishing indicators further support a malicious intent to trick the user into downloading a payload or engaging with a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=eastern+center+for+arts+and+technology+lpn PDF link annotation
    • https://sugulone.weebly.com/uploads/1/3/2/7/132740418/xatorivapedavi-faragimamakosu.pdfIn PDF document text
    • https://garekaxini.weebly.com/uploads/1/3/0/7/130739167/sakuboto.pdfIn PDF document text
    • https://sevirisedug.weebly.com/uploads/1/3/6/0/136089940/dosubafawijifidobox.pdfIn PDF document text
    • https://xisosisudotaju.weebly.com/uploads/1/3/0/7/130738948/tokesot.pdfIn PDF document text
    • http://bukapim.mywebcommunity.org/wabosoxiwudi.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/what_size_tires_are_on_a_2005_chevy_equinox.pdfIn PDF document text
    • http://bepebeku.22web.org/38105830372.pdfIn PDF document text
    • http://samabev.iblogger.org/white_metal_platform_bed_full.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forojiwimudobo.atwebpages.com/depoger.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/muminibukeba.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/vampire_diaries_script_season_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5160bc91-cc2f-4eb9-a686-b52d67ffaf71/disney_cast_member_apartment_discounts_anaheim.pdfIn PDF document text
    • http://busapow.rf.gd/pack_n_play_bassinet_mattress_pad.pdfIn PDF document text
    • http://nipipaxala.rf.gd/18227333658.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/bryan_adams_albums.pdfIn PDF document text
    • http://dopugidov.rf.gd/19616952589.pdfIn PDF document text
    • http://fuvituze.epizy.com/chromium_web_browser_for_ubuntu_14._04.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8158f414-c939-4ad7-8f30-8ca4163cc59c/big_blue_party_speaker_weight.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/abacus_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2618342-68bf-4bfd-b1bc-9bf85a206955/how_to_proof_congruent_triangles.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_off0000e18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 5476 bytes
SHA-256: a92c7a324bcb9d1eb9845c8d6a7fa046332a5439fbd664b82b063747cc240bb3
font_01_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 11044 bytes
SHA-256: 4af0ecf0b93b5dec65a0d1f0caade1f2be875e9c1675864e32484bc1589ca7f3

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