Malicious PDF — malware analysis report

Static analysis result for SHA-256 825de190a44750ac…

MALICIOUS

PDF

73.9 KB Created: 2021-04-05 03:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 47b5b453bdff05e4e7716e470a5b58d1 SHA-1: 7ae4a096da87ad4f49bc4443bb5a143bee8ea7e7 SHA-256: 825de190a44750ac21c571aabc133bbf1b0aa30dbdac3dafe90f2219ab87e609
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=innova+3030rs+obd2+code+reader PDF link annotation
    • http://tujubafi.getenjoyment.net/acidosis_lactica_metformina.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/4K3Noic/soap_cutting_game_download_apk.pdfIn PDF document text
    • https://xokotenesuku.weebly.com/uploads/1/3/1/4/131438709/xupokofetoto.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/vuponizegig.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/atresia_pulmonar_con_civ.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/afee95a5be0c.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/L1igihj/ice_cream_cake_recipe_pampered_chef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_85df49606e56402e901c81c45c6ef1f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/setipupabonabijij.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/rubarulafezavefawag.pdfIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_f6ba54001cc14895b0bc0abfa88881fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/adelaide_royal_show_showbag_guide.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_c355367847aa41ea8725f21ab76fc5c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefipa/66703258729.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/bitlife_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/salenev.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/sonadekujidizito.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/latipepajoserogosejisuve.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/my_script_calculator_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/how_to_install_a_dometic_rv_ac_unit.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_ef0e1274bbf64c369a5648551cfda358.pdf?index=trueIn 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_off0000e3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 5476 bytes
SHA-256: f638a7e1a177f4dfe1049185504e2ab7f6f86c6c61a11925e8ac424f62561131
font_01_sfnt_off0000f68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68A 10516 bytes
SHA-256: 48379e45425bc6ee1fd9dfe79e92153725c75226547d8e3293fc4b21ae205a3c

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