Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f4d4f447310f0d…

MALICIOUS

PDF

76.0 KB Created: 2021-03-13 14:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7c23dbb583f3187764e918afb7258825 SHA-1: 2beb67953f1f809883a6ab97dc58bbfcd55fdbcd SHA-256: f8f4d4f447310f0dfb7c57e4ec7cb4ef18dca59a977437cbbed5f3dc0fd25197
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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=dericam+b2+manual PDF link annotation
    • http://tradestaroffice.com/rukadavafiravovebuxirinat0g.pdfIn PDF document text
    • http://storeeu.info/how_long_does_it_take_to_become_a_nuclear_physicistwe8go.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fec3b0c159ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449193/normal_601a9a8eef19d.pdfIn PDF document text
    • http://passive-income.ru/korow173nk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452372/normal_5ff8fc63cc636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450152/normal_60315f9415c70.pdfIn PDF document text
    • http:///iphone/11?[USERNAME]:[PASSWORD]&H602WVLCrtsp://cam/realmonitor?channel=[CHANNEL]&subtype=1M601WIn 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/7c865ba8-5559-483c-97cb-7fdc8315e4aa/lesson_plan_on_polygons_for_grade_2.pdfIn PDF document text
    • http://sozazavore.rf.gd/gmat_unofficial_score_report_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef18308-0b87-4854-9324-bd4a2459794b/62721015368.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/akai_mpc_studio_black_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986b7d1c-cabc-4cb7-9a95-f556d641756b/6451026667.pdfIn PDF document text
    • http://joxelexudar.epizy.com/abortion_law_reform_act_nsw.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/sheep_heart_dissection_lab_answers_key.pdfIn PDF document text
    • http://kixomeremit.epizy.com/82383792663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076fca04-775e-48e8-9b85-e75f5c8e01b4/sibutuwatakuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1905fd0f-a32d-460e-acd9-5e2c3e46b6be/wojipew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d906fdc-b405-49b2-ba8a-068e53e1c71d/2006_scion_tc_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a658fc7-1e35-4b01-9476-1a5a6eacd0dd/jarefixivupatilugagetin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e805c97-38de-4a16-bb2c-1fc15e7ad04b/suvigi.pdfIn PDF document text
    • http://fezitovowikawof.epizy.com/tufasatunuwidotiluj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae6349b-3b89-4abd-aa81-6236a33eb805/how_to_set_up_swann_security_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc58f8dc-1f24-440d-80a6-f02687496b6b/essay_topics_for_isc_2020.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_off0000eac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 5036 bytes
SHA-256: 90184a2cdf7095af2a405c7418e1afb6fc2a2fc0c351c0a24287e6efc7639dd1
font_01_sfnt_off0000fbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD0 11400 bytes
SHA-256: e5b9cca0e7ba28c49f64a534cc285142c1758e0a3bcbfbdcff5123e3a93b8e83

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