Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bab94a23d2cc6d0…

MALICIOUS

PDF

72.6 KB Created: 2021-03-21 03:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 06fe59c53225e4c8cab03aabeae2e5d6 SHA-1: 926b75289c4717e7233466ca29c2cf7697c26093 SHA-256: 9bab94a23d2cc6d026548b14ac98dab06a5ef552ef86b0134d852ee97be97dec
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 0.9998

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://kuzutuzo.ru/aws?utm_term=a+dog%2527s+purpose+full+movie+free+online+in+spanish PDF link annotation
    • http://shoes-storie.club/where_to_buy_a_vcr_dvd_comboc3z8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444644/normal_5fc6440ec4e69.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/how_to_calculate_initial_velocity_with_angle_and_distance.pdfIn PDF document text
    • https://tebojizo.weebly.com/uploads/1/3/1/4/131406069/pupokigeg.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/cch_chuyn_t_nh_sang.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/assessment_form_for_physiotherapy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486060/normal_5ff8486ed8fb7.pdfIn PDF document text
    • http://kasyanbeauty.com/how_to_replace_element_on_jenn_air_cooktopyqwnb.pdfIn PDF document text
    • http://marketes.pro/vavotanajojikuttj3td.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/what_is_un_2030_agenda.pdfIn PDF document text
    • https://rerigasudete.weebly.com/uploads/1/3/4/4/134498455/67a4b33d2c6.pdfIn PDF document text
    • https://dukalafaziwemum.weebly.com/uploads/1/3/4/7/134772398/7912257459c03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fd86d4d89861.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/844a96fa-7abd-42f5-859b-60cb0ad9374d/barre_chord_chart_fret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d281063-e754-4b4b-a385-a06100545bee/suvimovopopomot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8979edd-fd72-4ea5-991d-a9959ce975f1/82099274946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b91c64e-540d-4b05-8a38-a1ecc5988b54/plot_diagram_order_definitions.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_off0000dec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC5 5540 bytes
SHA-256: 3a8e8501cf2298e24a13db3ef30ecdd3e2696bc5194a074fc71fde7f1275be2a
font_01_sfnt_off0000f180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF180 10288 bytes
SHA-256: 3a3479e411014a022460dd2cdfdb59c14f5af380b29b723c60906edf55f7f1ed

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