Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63e1b17e2fc85f7…

MALICIOUS

PDF

72.4 KB Created: 2021-04-10 10:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 501b8033be776e75b777613f9935d51e SHA-1: 9f37b2b059f28e7391c18cffbd2c7312abb7a336 SHA-256: e63e1b17e2fc85f7f5178bda0cbeeb9380cb7330382271820d1dcb1fe6e12d83
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://mezovuduw.ru/strik?utm_term=flat+stanley+book+1+pdf PDF link annotation
    • https://cdn.sqhk.co/fajixojemom/fjghhjd/carx_drift_racing_2_apk_original.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/HYicF1w/gunship_shooting_strike_battle_mod_apk.pdfIn PDF document text
    • http://vibigalobonewil.iblogger.org/titizidimubuxegakagabe.pdfIn PDF document text
    • http://jewidexomemivib.iblogger.org/isaac_albeniz_asturias_piano.pdfIn PDF document text
    • http://sijuvibitita.iblogger.org/nhlbi_asthma_guidelines_epr-_3_aug_2007.pdfIn PDF document text
    • http://forijezuxo.22web.org/liranoxar.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/agf6Coi/dude_perfect_toys.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/89Shjif/80081075255.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/QEjbjdz/live_stream_tv_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/gdjdpjc/extreme_racing_suv_simulator_mod_apk.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/faf19036-2038-4411-8988-4723d34a30fe/zoxov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc21185f-7a10-4e2b-a8d0-b12d2c8f7c00/susikululezijosusikuxisev.pdfIn PDF document text
    • http://vokerajud.epizy.com/49632587892.pdfIn PDF document text
    • http://lobosenus.epizy.com/almaany_kamus_arab_indonesia_pro_apk.pdfIn PDF document text
    • http://merekum.rf.gd/82527740921.pdfIn PDF document text
    • http://sikezixivuvuda.rf.gd/clash_hero_apk.pdfIn PDF document text
    • http://fabonek.rf.gd/76194329900.pdfIn PDF document text
    • http://rosajojubafemul.epizy.com/86397425768.pdfIn PDF document text
    • http://menepukezovexo.epizy.com/what_are_good_communication_skills_in_the_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5b8125-55c9-4e8c-a5a1-9a61b5492c26/gofunowasujirapasuzudef.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_off0000dcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC5 5252 bytes
SHA-256: b41855c1521170482bc095a98786937833a3ffa4d1737c3c3759c9c298a69654
font_01_sfnt_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 11076 bytes
SHA-256: 6bd9fc310e2ded497f0b4f89283c183e858124e2a58c04f336728a25eab19084

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