Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9620a2dd2cbe056…

MALICIOUS

PDF

82.7 KB Created: 2021-04-30 19:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 13945c30828de434d41e45dc60f83fd3 SHA-1: 5e177d8ba0aa66ed18033fc0c16565d55461a6e2 SHA-256: e9620a2dd2cbe0562ee5f2950b3345ee5979aee0e1fc3b5ecb18dae8ccb02c63
128 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one specifically designed as a redirector for 'dixie chopper dealers around me'. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is part of a link farm on disposable hosting, further supporting a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited -15. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://druttle.ru/strik?utm_term=dixie+chopper+dealers+around+me PDF link annotation
    • http://mon-cmso.best/390622456u3lnc.pdfIn PDF document text
    • http://itash.space/what_is_the_difference_in_analyze_and_evaluateopllk.pdfIn PDF document text
    • http://businesslinecenter.com/wovetomoxikatovetirinedt8djk.pdfIn PDF document text
    • http://itchia.space/how_do_i_reset_my_motorola_phone1qae0.pdfIn PDF document text
    • http://glossywp.online/58885550617qo8so.pdfIn PDF document text
    • http://otomail.business/does_covid_19_need_to_be_capitalizedjokq8.pdfIn PDF document text
    • http://mazers.fun/45400234287cwh1p.pdfIn PDF document text
    • http://form-copyrightservices.com/37762314359tic5u.pdfIn PDF document text
    • http://glossywp.online/14260367304rl5c4.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/is_it_safe_to_use_a_kerosene_heater_in_a_garage.pdfIn PDF document text
    • http://50offshop.info/movie_box_jailbreak_ios_1150847.pdfIn PDF document text
    • http://cheapestshop.xyz/brock_lesnar_song_320kbps7zyri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_194fb9d2a1f34613a4b5edaab3883202.pdf?index=trueIn PDF document text
    • http://zukugozig.epizy.com/hamilton_beach_47950_brewstation_12_cup.pdfIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_c57dd5d5dbc545a694cd1e72e75634e5.pdf?index=trueIn PDF document text
    • http://zozoresupiz.epizy.com/30388042937.pdfIn PDF document text
    • http://terexibuf.epizy.com/xbox_live_gold_card_code_scratched_off.pdfIn PDF document text
    • http://jupevesu.atwebpages.com/mathematical_symbols_with_names.pdfIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_7c62a152432d411fb2dc6fbba8f619a9.pdf?index=trueIn PDF document text
    • http://xefiposokupama.myartsonline.com/96044153331.pdfIn PDF document text
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_054078a1d17b4d31ad58be6b7723a801.pdf?index=trueIn PDF document text
    • http://pudolajuji.atwebpages.com/corporation_bank_account_closing_form.pdfIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/33971343201.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_off0001051a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051A 5380 bytes
SHA-256: f5b1ac3b26e94bc1d7d03eddd493a78243d0c8d24227796f60f8052192483bae
font_01_sfnt_off00011742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11742 11000 bytes
SHA-256: 06396117e9dbeb7b7b924ff4f3e19943724f53f10aaced04c1208241c611edd0

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