Malicious PDF — malware analysis report

Static analysis result for SHA-256 7150db354a6eb711…

MALICIOUS

PDF

101.7 KB Created: 2021-04-24 18:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 564c0240f3702cd38eda3e88823ba01e SHA-1: b13d777fc6ee0b5874bbff6bff8b5da04fd87315 SHA-256: 7150db354a6eb7114195fe16e59b57c5e28ea98fbacb17070b17033009abe524
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to 'American megatrends cmos settings', which may be a lure to disguise the malicious intent. No scripts were extracted, but the presence of many external links points towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://bologen.ru/strik?utm_term=american+megatrends+cmos+settings+wrong+cmos+date+time+not+set PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471719/normal_601dd7e172c4f.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/spondylolisthesis_exercises_to_avoid.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/94850711972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481270/normal_6008b91f4855f.pdfIn PDF document text
    • http://saxosoxajivovud.medianewsonline.com/bearing_problems.pdfIn PDF document text
    • http://tewatag.medianewsonline.com/analogy_for_ssc_chsl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_605f54b538931.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/aifjesw/vevabun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_604b93e83fac0.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/beethoven_sonata_19.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/98996415393.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/zunoramog.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/gjjggie/my_baby_care_2_bebek_bak_m_2.pdfIn PDF document text
    • https://cdn.sqhk.co/lukulobu/igLjehi/skyrock_radio_numero_toulouse.pdfIn PDF document text
    • https://cdn.sqhk.co/gawivoxolo/gjfiage/bond_energy_calculations_worksheet_with_answers.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/guvolotusedunurivodet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390373/normal_6002363083a7e.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/67705844447.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/43288287688.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/ajihugg/the_intelligent_investor_quora.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/lidewinepebowonegijaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e69f4e-7d77-42c2-b2ab-267e43749fa9/marlin_60_vs_ruger_10_22_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6db56a4-05da-4c81-9cf7-c27af106d30b/first_aid_usmle_books.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/bootstrap_checkout_form.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12010 5096 bytes
SHA-256: 7b941857cbfd455ac0b5acc9fc32be0e408d1075a6d676a98760c5fc1e1809b1
font_01_sfnt_off00013148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13148 4636 bytes
SHA-256: 5127d08088badf9dc4c25f8240703b35ece72d4f1fff8ae083c1f847cbef2dc0
font_02_sfnt_off0001403e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1403E 7120 bytes
SHA-256: 6faaaaf5d7c7e14a84bb004a08c2f89a29eee94ce8708bab39f6736c45484a65
font_03_sfnt_off0001538c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538C 11216 bytes
SHA-256: 482cc4eec0e4727b2a02278919ce1be7143007258dfe322905e2fbe2c285af17
font_04_sfnt_off000179b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179B1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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