Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0d4e3ee2080e07…

MALICIOUS

PDF

80.6 KB Created: 2021-04-28 12:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2f119fecabd777aa92712c5ed0419841 SHA-1: dff28be53446c000b0f750741eff834df81c9e59 SHA-256: af0d4e3ee2080e0765e6b4ee3532c2355b84a8850c2fc16eb7a9288023ce7cc7
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 0.9994

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://fokemale.ru/strik?utm_term=how+do+i+get+a+copy+of+my+mn+driving+record PDF link annotation
    • http://mirumumavetifun.mypressonline.com/what_is_a_custodian_of_records_affidavit.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/YdjiSM3/indonesian_drag_bike_racing_apk.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/41758533021.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/phoenix_bios_beep_codes.pdfIn PDF document text
    • http://sunugukumota.getenjoyment.net/17689763922.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/hjukgge/photos_tv_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/hcihHig/javudixozibapo.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/hdgubic/76170699060.pdfIn PDF document text
    • https://cdn.sqhk.co/wejafivelij/jhhgijd/life_simulation_games_for_android_free_download.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/67600126732.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/viroril.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_907844b5d6964f40bd4296b5bed8eb62.pdf?index=trueIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/bosch_1617evspk_wood_router_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/is_galaxy_s9_better_than_s10.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_395163b54f86424280c5b1cf9a032a50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/vexafololojojozejazesis.pdfIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_1c3607c1727d48629f1c9de6d249f386.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farowug/pizetumewedegoxaju.pdfIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_b0c232615ffe467d8a354e33a219af7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/kilivujowob.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/27875607186.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/12101610626.pdfIn PDF document text
    • http://xovefopu.myartsonline.com/90925208899.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_off0000fc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC43 5480 bytes
SHA-256: a000b6bf808372abc001696ed7880acc41a4f15cfeb8f3288297a0e11304bf81
font_01_sfnt_off00010efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 11072 bytes
SHA-256: 12d564530e2588f082b8578d0844dfb9b5f698c5da41a74dc08641385f411ed5

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