Malicious PDF — malware analysis report

Static analysis result for SHA-256 30653377aa257e6e…

MALICIOUS

PDF

81.8 KB Created: 2021-05-17 05:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 532b06dc7d97b6ee19a5782c60a3bb97 SHA-1: 84ce4420477e5a76c8bd59bc571c035ed3b107e4 SHA-256: 30653377aa257e6e7f99b1f7d72f8684fff314794c0d20ff1f758a490b310c98
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-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://golowaki.ru/strik?utm_term=how+to+connect+usb+to+computer+for+internet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420244/normal_5ff77a1f8b355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_5fe7de7c75433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_601d63c26739b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452173/normal_600c9df308503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426423/normal_6047b40adc5a2.pdfIn PDF document text
    • http://miiliioner.xyz/periodic_table_with_polyatomic_ionsl0pnv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450427/normal_5ffe17ac3a104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_602c506430ffc.pdfIn PDF document text
    • http://topsalon.xyz/zomenihsqqc.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428078/normal_6020aae10a07f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388424/normal_5ff85bffe6c8f.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/5717b7f3-021a-4644-809e-0e14e7e56849/95843871694.pdfIn PDF document text
    • http://puwagof.rf.gd/english_book_class_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8766d852-3bf9-4300-a1eb-cbbe29c1d55c/shark_cordless_pet_perfect_2_reviews.pdfIn PDF document text
    • http://fusuxitizubuka.epizy.com/how_much_is_infinix_note_5_in_kenya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2bcb8ee-f5ba-428a-a008-3ae24e0ae061/what_to_read_after_percy_jackson_and_the_olympians.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9202a0c-1210-4d8d-ade9-38de37613a54/dell_studio_1737_ssd_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2526dc-d137-492b-a0e7-0b17ef8ced97/fizarejaza.pdfIn PDF document text
    • http://wesaxerofirivo.epizy.com/odisha_b._ed_result_2020_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b091f1-5757-4d3b-88ae-73e1e80fe725/reliability_engineering_and_system_safety_scimago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6df030a-1423-4924-b35a-5ca8e55d46be/rear_seat_entertainment_system_toyota_land_cruiser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e887aa7a-61ae-4983-aaee-00a6282b7620/70051523736.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_off00010223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10223 5112 bytes
SHA-256: e3669426339e280f476da79faca118ed85442a192474a383d5b109a18ead1933
font_01_sfnt_off00011383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 11068 bytes
SHA-256: b67632eadcf9efcc56183c8170b149708f01973a19b7cd0a42cd5526225cc2a7

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