Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ea0f127349b3e8…

MALICIOUS

PDF

76.0 KB Created: 2021-04-02 03:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 107cb553354a864aace1ba9f4da27c06 SHA-1: dd7225b41a30f2661b6393e32079aa7a51536a0c SHA-256: 63ea0f127349b3e8182119d5278a6c4f5bc6b810f20af2f39b026934e55f2169
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 0.9995

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://dafemum.ru/aws?utm_term=sas+macro+loop+over+list PDF link annotation
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/5914372.pdfIn PDF document text
    • https://womepibenim.weebly.com/uploads/1/3/4/0/134040947/5b05f958d15adc2.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/gcjflss/thomas_friends_adventures_shark_escape_playset.pdfIn PDF document text
    • https://cdn.sqhk.co/wozepefiga/jdhbK8l/costume_jewelry_rings_uk.pdfIn PDF document text
    • http://figedizizexi.22web.org/40617216910.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/05930255.pdfIn PDF document text
    • http://ig-soft-team.com/reretevc27z.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/gkiihdh/pajasibajuxabideluvozu.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.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
    • https://s3.amazonaws.com/zoromexemuzid/lord_of_the_flies_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/livegowokezajat.pdfIn PDF document text
    • http://matasup.rf.gd/how_long_do_you_cook_a_rib_roast_on_a_rotisserie.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/indonesia_visa_application_form_singapore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b44b3be-4196-4436-9cc3-66cfc4b18fc1/zilarunemepomivugeguduva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e48c98c0-7bc5-4a19-8ecf-f6c7ca6b902f/suwamulobovopuwejewofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/639c5853-65a3-46c3-93ac-d2d233d6ed38/67289002420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa6ef0d-e220-4246-b0b1-a8e60601f7c5/lochinvar_gas_boiler_prices.pdfIn PDF document text
    • http://sidinikoxa.epizy.com/agriculture_urbaine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26cbe29-dc7a-4ee5-b4cd-c65e37c871f8/what_gpa_is_required_for_cu_boulder.pdfIn PDF document text
    • http://tuzoxizusuzu.epizy.com/can_you_make_bread_in_a_bread_machine_with_regular_flour.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD279 4924 bytes
SHA-256: 09c857bbdc63976508c7011be3b94c66f611a81fc0040fde6759d6743be3b3f1
font_01_sfnt_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 1940 bytes
SHA-256: 3c8c70e95e172d87f88249f6e98f5fcd1d779dd22b9512bb6276049fa774e71f
font_02_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 11548 bytes
SHA-256: df08be3ccdeb0d39fb6453adbad67153012afbf0ff71fa4807454bb39ddad390
font_03_sfnt_off000112c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361