Malicious PDF — malware analysis report

Static analysis result for SHA-256 2442e60506d60077…

MALICIOUS

PDF

75.6 KB Created: 2021-03-03 15:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: deeecf7afe89c1f23576e5ae623de960 SHA-1: 9567f308beb7c802c875fb83940c5c036542ba61 SHA-256: 2442e60506d600774fda544ee1c2caa3bbe226c035569e690c561c4aefc1b4e3
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 0.9997

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://resalured.ru/123?utm_term=best+app+to+learn+arabic+2019 PDF link annotation
    • http://itdomen.fun/why_wont_my_kenmore_microwave_heatf052q.pdfIn PDF document text
    • http://energytik.net/icd_9_code_for_general_fatigueporsq.pdfIn PDF document text
    • http://cmbmarketing.agency/62377799904sxhlc.pdfIn PDF document text
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/pimebekim.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/6bjhajc/golden_coast_beach_hotel_hong_kong.pdfIn PDF document text
    • https://rizebilawi.weebly.com/uploads/1/3/0/8/130814716/fuxatef-mevoxekegebes-weweninudamemu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fdd5a00debd4.pdfIn PDF document text
    • http://file-id.ru/comparative_and_superlative_exercise4no46.pdfIn PDF document text
    • https://fafutetigav.weebly.com/uploads/1/3/0/7/130775448/e9b9ee9.pdfIn PDF document text
    • http://trend-sales.fun/automatic_car_parking_system_ppttsszl.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/8khiBEt/91302103939.pdfIn PDF document text
    • http://innov-cis.net/dsm_5_homosexualitye6hbi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_602755f06c480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_5fe9a56c7908a.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/laxulujulakijit_pumobabakedu.pdfIn PDF document text
    • http://jixuvofariva.iblogger.org/how_to_repair_fisher_and_paykel_dishwasher.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_6035595945916.pdfIn PDF document text
    • https://cdn.sqhk.co/luvutagawata/3UjVdpd/water_parks_open_in_california.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rejefuwozumij.rf.gd/online_web_to_converter_software.pdfIn PDF document text
    • http://segoxegigo.epizy.com/42256896237.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_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 5596 bytes
SHA-256: 1aafbeffcb5f2a8bf12c7a1ae0dee7fb1b29de76fd804787ac6c6b3945399187
font_01_sfnt_off0000fc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC84 10640 bytes
SHA-256: 5dd223b8959095d08d0c21f4ef6621a0b7b9ddc12575fcd35735b70087486900

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