Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f2f05e584f327a…

MALICIOUS

PDF

81.0 KB Created: 2021-04-05 02:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1f620fc4d114ed888a09bc7e9a37c6f5 SHA-1: 8ce893db43cf3cec84b43c7d1c9d52e553cc315b SHA-256: 56f2f05e584f327a96237cd2e2aa42c145d9e8369b9fc51978ef3a77c6b8046b
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wix?keyword=license+to+preach+the+gospel+certificate In PDF document text
    • http://felulofija.22web.org/how_to_turn_on_a_samsung_that_wont_turn_on.pdfIn PDF document text
    • http://sukozuxari.22web.org/cordless_phone_with_answering_machine_panasonic.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/difarasodozafuzu.pdfIn PDF document text
    • http://dibuxovowo.iblogger.org/blockman_go_apk_1._9._16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lixipixamum.rf.gd/calculus_early_transcendentals_3rd_edition_briggs_solutions.pdfIn PDF document text
    • http://bawemolar.epizy.com/revamojujisab.pdfIn PDF document text
    • http://zurimuvuk.epizy.com/10846065308.pdfIn PDF document text
    • http://wojobawezelo.rf.gd/alan_watts_books_free.pdfIn PDF document text
    • http://lepevalir.rf.gd/36997129047.pdfIn PDF document text
    • http://fudakudawape.rf.gd/antony_beevor_stalingrad.pdfIn PDF document text
    • http://satekivu.rf.gd/77489196897.pdfIn PDF document text
    • http://zorenepovapaj.epizy.com/lanoxemakapomud.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_3e266d0b14e1405298491e1a52ce5625.pdf?index=trueIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_0fe0632221594f24982ed89ea7f6a076.pdf?index=trueIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_8f76335873fd4a79a17e712166e9b5e6.pdf?index=trueIn PDF document text
    • http://gejamuromina.rf.gd/autumn_leaves_sheet_music_guitar.pdfIn PDF document text
    • http://damoserik.epizy.com/vax_ccmbpcv1p1_user_guide.pdfIn PDF document text
    • http://kugidozu.epizy.com/87111056430.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/jaravemikofeb.pdfIn PDF document text
    • http://wififeju.atwebpages.com/montana_1948_movie.pdfIn PDF document text
    • http://finesegugumemo.epizy.com/30789704431.pdfIn PDF document text
    • http://mirijevedot.epizy.com/employment_news_in_tamil_this_week.pdfIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_a3987d4b4e764fabafdcb1a931d76920.pdf?index=trueIn PDF document text
    • http://gofirog.epizy.com/rinitis_vasomotor_adalah.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 5004 bytes
SHA-256: adff9e1327d8c5f5c8f4b5a95f1e261c92b85803a640fe0a2afdf9df40111229
font_01_sfnt_off00010316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10316 10852 bytes
SHA-256: 4af9e150bc20f25fc1d989c1aed8f113bc9cb9d6967fc9978f546326f1cc6add
font_02_sfnt_off0001283f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3