Malicious PDF — malware analysis report

Static analysis result for SHA-256 775cf3f4f750ac7a…

MALICIOUS

PDF

76.2 KB Created: 2021-05-17 05:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2f643a8317c8178e76e9442eeb5a661e SHA-1: 7083cf6a1bff4cd68365713328cc14a3ff7af7a9 SHA-256: 775cf3f4f750ac7ac95d652f6da3559403a19695cb07f99b538273f0aabc2df0
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 0.9996

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://nipisod.ru/strik?utm_term=how+to+make+cool+art+on+procreate PDF link annotation
    • http://dhl-order.info/how_to_update_apps_on_lg_smart_tv_2017lhrfx.pdfIn PDF document text
    • http://polnews.xyz/free_blank_sheet_music_printablerpddb.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/ygegfZr/bluetooth_car_diagnostic_scanner_amazon.pdfIn PDF document text
    • http://energytik.net/xirepebulumefike6jgq.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/sakilapiroje.pdfIn PDF document text
    • http://newapegujopabi.22web.org/pictures_of_hollis_woods_chapter_3_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/xijisejes/hjigghd/reverend_insanity_wuxia_index.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/21879261316.pdfIn PDF document text
    • https://cdn.sqhk.co/zedazisem/gficiir/xologosunolumemadewulixuw.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/bEievjb/nuevo_pase_elite_de_free_fire_octubre_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vesedakowata.onlinewebshop.net/anansi_and_the_turtle_story.pdfIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_ce7f84933a9f4c83a95b93f126b69942.pdf?index=trueIn PDF document text
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_716bc19736004bf8823b06ceb65aee06.pdf?index=trueIn PDF document text
    • http://bavalididot.epizy.com/garmin_rino_650_aa_battery_pack.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_b241049d226c49afac177e42490c007d.pdf?index=trueIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_c5d386be1df44afa8640a668a023d35a.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_469a9835bec04440afb2e820d768f333.pdf?index=trueIn PDF document text
    • http://rowavironipomiz.epizy.com/youth_daughter_piano_sheet.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/noxalupefekekiva.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/bomb_calorimeter_working_principle.pdfIn PDF document text
    • http://dusameferadulo.onlinewebshop.net/sample_scantron_answer_sheet_for_let.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_off0000eac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 5020 bytes
SHA-256: d76b132c333c147fad8094be35912bd82bca56c6828af348ed617798f9252177
font_01_sfnt_off0000fbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCE 11552 bytes
SHA-256: 4b318af64f28668269b36e290307259ed10b2d3a19f0ef04200b53e6a8c18dd0

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