Malicious PDF — malware analysis report

Static analysis result for SHA-256 adcfe332e2fa2587…

MALICIOUS

PDF

90.8 KB Created: 2021-03-17 12:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8aea7a560d1066af6f5a0a23af420e10 SHA-1: a2641cd4d1be1fca556003172554f77792a2f938 SHA-256: adcfe332e2fa2587d5b55819da339160e6d01e28922f0c29e4ca89ff00e1d41b
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 0.9993

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://lozipotod.ru/wix?keyword=acer+aspire+user+manual+pdf PDF link annotation
    • http://vzruvayarttraff.xyz/kyocera_duraforce_battery_pullh76aw.pdfIn PDF document text
    • https://cdn.sqhk.co/guwodirulik/bPizbgf/bible_study_on_prayer_and_fasting.pdfIn PDF document text
    • http://mscredit.info/plant_adaptations_worksheet_2nd_gradeyoqe0.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/dsPhahd/51232519365.pdfIn PDF document text
    • https://duzozerijadid.weebly.com/uploads/1/3/4/4/134493401/6594457.pdfIn PDF document text
    • http://obuv-kozha.ru/construction_estimate_handbookh52xf.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/siajbuU/scary_clown_survival_horror_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/aE0wSVN/stickman_fight_dragon_legends_battle_unlimited_money.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/coordinate_geometry_booki8vsf.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/8625918025.pdfIn PDF document text
    • http://top-odejda.com/mawofivyav1.pdfIn PDF document text
    • https://wuzitefagoxu.weebly.com/uploads/1/3/1/8/131856046/20771.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/95835113896.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/vubonolasi_pesumuw.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/6HgfDbR/microsoft_stream_share_video_permissions.pdfIn PDF document text
    • http://pewodebepefawi.scienceontheweb.net/miopia_e_atropina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_33e94877d3544288b87dc05555422744.pdf?index=trueIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/94686415720.pdfIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_a2699ba4880b4b7b81af8bb44ded907f.pdf?index=trueIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_08d37ea13d924cadb549a9ec496f0a11.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f816a1b5-14c9-4267-948b-604bef89a83f/financial_peace_university_classes_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f82639-b4b9-4551-bcaa-dc4f869eb09d/20059879366.pdfIn PDF document text
    • http://vawirir.atwebpages.com/expresion_corporal_definicion.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_off00012463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12463 5288 bytes
SHA-256: f75a16f1b00e89bc531ec064cca690544abffc529ff39a2bd8cdcdb7853c7688
font_01_sfnt_off0001364c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364C 11256 bytes
SHA-256: 7d48fab8bf9d15d53df957f40824313f3abb6a7e6438cbeee6307de68c30e995

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