Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a16d87dac6b1e4…

MALICIOUS

PDF

75.4 KB Created: 2021-03-08 01:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c7ea8c84093bb58388d4b9264036faa9 SHA-1: dc51f7a5a7c1abc368b24c0838b522ed78556e75 SHA-256: 76a16d87dac6b1e4b2c6b9d8b0715874469e1eb0a3dd2be1bed72ba44e437892
126 Risk Score

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 0.9947

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://jumiwimov.ru/strik?utm_term=blue+is+the+warmest+color+watch+online+123movies+english+subtitles PDF link annotation
    • http://freshka.fun/kenmore_elite_top_load_washer_moldmxi2n.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/h3PLRXE/wegitaranosi.pdfIn PDF document text
    • http://italdom.fun/xisixagakapozawuvunirisax4jf1j.pdfIn PDF document text
    • http://mmuuue.space/jodha_akbar_tamil_hd_videoir0m1.pdfIn PDF document text
    • http://findonelove.online/98943183955j7gyo.pdfIn PDF document text
    • http://bestsaleshopin.xyz/our_lady_of_lourdes_basketballymvwa.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/bgjTCgj/zoho_crm_inventory_templates.pdfIn PDF document text
    • http://lady-bug.club/lologawegelejivexizudura2pko9.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/jibgcii/xudexugo.pdfIn PDF document text
    • http://lazerepil.site/kivufuninapanejc8ag.pdfIn PDF document text
    • http://smartcreditscore.info/877842576807py55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5fd3ba1651678.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367919/normal_5feb341ca8b6b.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/3jdbidw/51997658677.pdfIn PDF document text
    • http://forpost-electrica.ru/tensor_calculus_made_simple_sochiebz1w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478703/normal_5ffce020af9bb.pdfIn PDF document text
    • http://madewithsunshine.com/alachua_county_school_calendar3dmr5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_603f78077ffba.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/muzor.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/hijfOjf/celestial_equator_astronomy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_603b3e36261b9.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/duzexefemosaxe/engineering_drawing_viva_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/finding_missing_angles_complementary_supplementary_worksheet.pdfIn PDF document text
    • http://dusekamalebe.rf.gd/height_limit_for_rides_at_movie_world.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/wunatusupujixeve.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/android_location_api_using_google_play_services.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/tasezanosowafevibek.pdfIn PDF document text
    • http://borinalujid.epizy.com/burris_eliminator_2_user_manual.pdfIn PDF document text
    • http://nefoxujegodusif.rf.gd/answering_service_of_richmond.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD633 5784 bytes
SHA-256: a191a25248f5bbf7274b9b8cd1bc57f72e70c49602af75275586e07b01eda062
font_01_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 10872 bytes
SHA-256: b9d0adcbd035451a61e6989324abb1bffde847af1b6a066e36c58dd10fe8d372
font_02_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71