Malicious PDF — malware analysis report

Static analysis result for SHA-256 762eaf52d1672324…

MALICIOUS

PDF

77.6 KB Created: 2021-02-21 08:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7c0e25ea3c63c3beff78ede65fedb0f1 SHA-1: 54dc0ab5cec9c38a06e90ae8146bd0365856e203 SHA-256: 762eaf52d1672324349ba3274c496955fa4bbf6a4768a6444ec1fb5c6695ed40
184 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Hynix ram service center near me'. The primary IOC is the malicious redirector URL, which is likely used to host a phishing page or deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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.
  • 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://yafferge.ru/strik?utm_term=hynix+ram+service+center+near+me In PDF document text
    • https://cdn.sqhk.co/pagifizipafo/gdabnbl/parallel_world_meaning_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/cK442ig/cargo_delivery_truck_parking_simulator_games_2020_download.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/bf1a17be285.pdfIn PDF document text
    • http://allwoman.site/15374720966nwb67.pdfIn PDF document text
    • https://cdn.sqhk.co/wagavoketi/idk1J2z/eagle_claw_steel_egg_sinkers.pdfIn PDF document text
    • http://vnds-super.space/declarative_interrogative_imperative_exclamatory_worksheets7w246.pdfIn PDF document text
    • https://tavigawatogup.weebly.com/uploads/1/3/5/3/135389884/19564.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/3936797.pdfIn PDF document text
    • https://sizuginoten.weebly.com/uploads/1/3/4/4/134490660/gisabaxanev-jisir-pejuzinisuse.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/mufagojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fodose/10522838607.pdfIn PDF document text
    • http://roniderekatitim.rf.gd/nilaxebavegupajafemogaraz.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/87335578463.pdfIn PDF document text
    • http://rosiwik.epizy.com/wow_classic_priest_leveling_gear_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/rainbow_rowell_carry_on_espaol.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA1 4780 bytes
SHA-256: 165d19134581f715a663450449ba1c977de7e704ca472a0b2011b5ea9ba2a2a8
font_01_sfnt_off0000dfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC1 11204 bytes
SHA-256: 56c390eef9d7acb12203201bc14604f29f9250d9dc0bf9ddfa08e259f62f5ce4
font_02_sfnt_off0001060f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060F 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
font_03_sfnt_off00011b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B24 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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