Malicious PDF — malware analysis report

Static analysis result for SHA-256 486f1650309d015e…

MALICIOUS

PDF

70.8 KB Created: 2021-03-04 01:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e76787891d5fb066523e0d6fd44a20a2 SHA-1: 95e4c931069c12f3023394ffd282cbd41a23d4aa SHA-256: 486f1650309d015e8a935e11dd76273d2ed4234775c7d77e3bbc898bcae04879
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 0.9997

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://jottigo.ru/strik?utm_term=genius+g750+battery+charger+instructions PDF link annotation
    • http://dujojiwasemob.mywebcommunity.org/21205560554.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/EB0ia6u/22962956234.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/revonemuleje.pdfIn PDF document text
    • http://bristol-yalta.run/how_do_you_take_apart_a_keurig_to_clean_itefmgc.pdfIn PDF document text
    • http://kengoru.space/hine_ma_tov_sheet_musichwb6w.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/gexej.pdfIn PDF document text
    • http://xevamoz.mygamesonline.org/xiwasafofus.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/ionic_pro_air_purifier_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/geJgfDj/prepper_supplies_food.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/is_wolf_of_wall_street_a_true_story.pdfIn PDF document text
    • http://erkutungotu.com/yiruma_sheet_music_amazonlnc3r.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/32VKhaT/notes_icon_blue_aesthetic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kedisijusa.onlinewebshop.net/gunamerus.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/57792484166.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7A 5532 bytes
SHA-256: aac8834bc3c541d92b3f35fdba4c488a48a117727ebde94c891fb0991b4b0ea3
font_01_sfnt_off0000dd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD52 10180 bytes
SHA-256: a8208f3483b632274d730bba7bae6b31f92848364b963e608e7004f0bc60229e
font_02_sfnt_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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