Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c12cca863bb4db8…

MALICIOUS

PDF

72.5 KB Created: 2021-04-05 19:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 841b58450666bbf8298e60e15f0c2122 SHA-1: 5aae47639a85a6790542b6d14deb3ef9624c95eb SHA-256: 2c12cca863bb4db8430897c17bf1cd57db2a733faac6976c84391e267645d982
126 Risk Score

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 0.9991

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://jacksth.ru/strik?utm_term=craftsman+25cc+weed+eater+spark+plug+replacement PDF link annotation
    • http://nawajojipiv.iblogger.org/maseginugipajesasodo.pdfIn PDF document text
    • http://benivosefemiza.medianewsonline.com/old_mans_war_books_in_order.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/10054908831.pdfIn PDF document text
    • http://bowuvudofi.scienceontheweb.net/islamic_bangla_book_free_download.pdfIn PDF document text
    • https://wefikugozakilo.weebly.com/uploads/1/3/1/0/131069992/nimojopeje.pdfIn PDF document text
    • http://mazonenebu.22web.org/78173399332.pdfIn PDF document text
    • https://mitebisaxu.weebly.com/uploads/1/3/5/3/135395238/gelijovonuwavon.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/6e0b5fdb6.pdfIn PDF document text
    • http://xadimilok.iblogger.org/46339248993.pdfIn PDF document text
    • http://gopururin.iblogger.org/bks_iyengar_yoga.pdfIn PDF document text
    • http://bubuwem.iblogger.org/google_chrome_standalone_offline_installer_64-_bit.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/7086751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidasumibave.epizy.com/retewetetikibesebol.pdfIn PDF document text
    • http://nibatozov.epizy.com/78134997844.pdfIn PDF document text
    • http://miwofalixi.rf.gd/tovega.pdfIn PDF document text
    • http://vopimivukaf.epizy.com/gumitini.pdfIn PDF document text
    • http://lejugolidisixod.rf.gd/553630870.pdfIn PDF document text
    • http://zebekebagen.epizy.com/kutevipinovowukewiz.pdfIn PDF document text
    • http://gifidabula.atwebpages.com/kofijepamejevofuji.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/english_words_meaning_in_marathi.pdfIn PDF document text
    • http://rofixalo.epizy.com/best_video_er_for_pc_windows_7.pdfIn PDF document text
    • http://zimadiwiv.rf.gd/59685331491.pdfIn PDF document text
    • http://wibitatazureb.rf.gd/31177815269.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/flannelette_flat_sheets_super_king_size.pdfIn PDF document text
    • http://fivosuregimafeb.rf.gd/nukoxiripaguseradufid.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_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 5792 bytes
SHA-256: c42ec5e7692ea34fd2fa5253e800dc529c4d485069ef9c8b4a0f9521217d4fa1
font_01_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 9988 bytes
SHA-256: 2758543e092e3b4c5050805a48acc3b003011ebb0db14886020c72d7fe94903b

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