Malicious PDF — malware analysis report

Static analysis result for SHA-256 57aa79cc946a257c…

MALICIOUS

PDF

78.5 KB Created: 2021-03-14 01:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0fe262e0d371963a931c8678c90c7d10 SHA-1: 5f6b35cd1608d2c00d4f111e0c2e6a0c9b3329ae SHA-256: 57aa79cc946a257c8d6f6e9429c7b1ec09e3b62dbdbd1f65d09028d5c4791e2d
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 0.9993

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://maypoin.ru/strik?utm_term=best+price+for+kitchenaid+food+mixer PDF link annotation
    • https://cdn.sqhk.co/runudori/dQjaXjd/fakivatojugo.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/cd_action_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kopubeno/SpghKgj/terminator_dark_fate_cast_members.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/QHxniil/blue_cross_blue_shield_federal_2021_rates.pdfIn PDF document text
    • https://wutadesojijemez.weebly.com/uploads/1/3/4/3/134393937/90b900e821b33e.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/odBgdg2/atif_aslam_songs_old_list.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/7831f7e91494aea.pdfIn PDF document text
    • https://lopetumidola.weebly.com/uploads/1/3/3/9/133989387/fevotemeradewanari.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/wexakipazolo.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/dnd_5e_avernus.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/ZicTNjd/32202721738.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sigobija/bose_sounddock_series_iii_power_cord.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/cardboard_rc_plane_plans.pdfIn PDF document text
    • http://tazomibege.epizy.com/78609460532.pdfIn PDF document text
    • http://botasalipigu.epizy.com/takezuzebol.pdfIn PDF document text
    • http://livirava.atwebpages.com/patirekivudel.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/43186679949.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/30787221923.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/vawaxutifebed.pdfIn PDF document text
    • http://rokabimokow.rf.gd/como_eliminar_hormigas_de_forma_natural.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/free_name_tracing_handwriting_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/bubble_shooter_5_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/minolta_srt_102_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/14454756174.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_off0000f416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF416 5544 bytes
SHA-256: 1a4415afd22c6afe55ca9aca01f8382f5477458c2ee33dcc5d6810dff1dfd848
font_01_sfnt_off000106cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 11228 bytes
SHA-256: 7c272edf167a83c825886477f59b6f84870dbb27bf4e5d10489f3b589434c208

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