Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba44cdea5e22876…

MALICIOUS

PDF

85.8 KB Created: 2021-05-11 00:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aca371227a17ad950aeb33ce2c6909ea SHA-1: 92718884e1595090265072e89f02a51066e51541 SHA-256: fba44cdea5e2287697405dbb3147e5dd48ceeaa7b683862a91aebc8314aba004
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 0.9995

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://lozipotod.ru/strik?utm_term=how+to+use+digital+multimeter+dt9205a+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449769/normal_605f3da6eb37e.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/74055134744.pdfIn PDF document text
    • http://luminar4-download.xyz/99655999257rnsuz.pdfIn PDF document text
    • http://lewabuvuk.22web.org/41833460052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5ff7d10a9291f.pdfIn PDF document text
    • http://niwopofe.scienceontheweb.net/kamus_bergambar_arab_indonesia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_5fe7921dde874.pdfIn PDF document text
    • http://sifuzifixezija.medianewsonline.com/accounting_standard_13.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/regogizibazibonidap.pdfIn PDF document text
    • http://kernig.pro/4342106485olfzz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pitaken.onlinewebshop.net/18363446903.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/c_t_r_l_full_form.pdfIn PDF document text
    • http://xodepew.epizy.com/64905848887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543088b4-84d4-4acf-9da1-f6c8b180b0c4/47682248409.pdfIn PDF document text
    • http://mujasanowagug.epizy.com/understanding_the_bouguer_anomaly.pdfIn PDF document text
    • http://suzufesa.epizy.com/best_songs_2019_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/remuxanibedolanegunowowor.pdfIn PDF document text
    • http://kizarepopudoso.epizy.com/formato_cdr_para_jpg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a905d2-50be-49f8-96a1-06d844781a8f/kinimajusid.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/briggs_and_stratton_snowblower_1024md_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ddca29-d57b-435c-8180-4b9d03df2e31/sulobutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bddfdeea-f981-46ee-ace6-9b3a8e4903a9/what_is_certified_iso_9001.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_off0000f221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 4004 bytes
SHA-256: 21e4c181e54d5ebb49ae3326fb869ea6975fbd5cab2c71a24214b3ad0637a929
font_01_sfnt_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 5968 bytes
SHA-256: a05ff91550efe0d5dbae35923db2942e15d9d07ffa0b9e0f7778616265ace81f
font_02_sfnt_off00011498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11498 17300 bytes
SHA-256: 3d2d6954f77079f72c45769c821860a1b2711e5d4a75ffd2ff778fb0ca09db66

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