Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3b4bcb13466bbf…

MALICIOUS

PDF

78.9 KB Created: 2021-04-12 01:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 72d65a5cca3df830cab0ce1d62e262da SHA-1: 5b62a91391f1a3cc0111bc8c33461a6e4fd4fe3e SHA-256: 5b3b4bcb13466bbf5b3dbb362f94d9035ae68b5c4fe33f3a2bc409ad8acc0890
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-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://maypoin.ru/strik?utm_term=link+to+the+past+release+date PDF link annotation
    • https://cdn.sqhk.co/linidivez/ghtibTj/79031598336.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/hiiebjb/little_heroes_learning_academy_mandeville.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/xifinata.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/ifljehd/zonasuxuziwazanevomiregaz.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/exercices_avec_avoir_et_etre_au_present.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/causes_of_bph.pdfIn PDF document text
    • http://butalinonoruma.scienceontheweb.net/patient_bill_of_rights.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/pagan_origins_of_christianity.pdfIn PDF document text
    • https://cdn.sqhk.co/rujuwawuju/biahgib/ramepune.pdfIn PDF document text
    • http://dakajak.medianewsonline.com/low_oxalate_foods_list_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijuvewoduga.onlinewebshop.net/can_t_help_falling_in_love_fingerstyle_tabs.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/1661982833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd05a43-d82d-41e2-ae55-09981cddfb35/10_parabolas_de_jesus_y_su_significado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd89e7ce-dc75-403a-8864-e7b4754e5c2d/honda_new_bike_dream_yuga_mileage_and_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ddc1a5e-b479-4383-a006-370235dc12b8/vofavamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a7b9abf-53f6-4457-bd95-9007951f9509/vupipaxewudofosuzaxovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6785f615-60dd-490c-bf0b-6ca886c881c9/gre_quantitative_percentiles.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/2003_cadillac_deville_dts_owners_manual.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/81156278069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9660fa6-0faa-4618-8051-dbe1afe862d7/97805914900.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/42345885659.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/aloe_blacc_love_is_the_answer_bersetzung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe4d691a-b04d-4806-8f15-e1d2159eb387/9822704913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a8935f-db1e-4f5f-9396-dadabbe5abae/the_sales_budget_is_derived_from_the_production_budget_true_or_false.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_off0000f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 5052 bytes
SHA-256: 9f871b106ab6852c1732ebb9a79f5712b2167e33095462bd94492c4c8be3ed57
font_01_sfnt_off00010639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 11936 bytes
SHA-256: 7f21c326b3933c0badc245fae8dfafaa731a432786873f3b1dc203465d198a7f

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