Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d9a69f9769c7ff…

MALICIOUS

PDF

83.5 KB Created: 2021-03-22 02:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8a770cc2be902f28337c88ec15f311a0 SHA-1: 3113773278c9c9dd3cd13970568cc4af01562c0f SHA-256: d2d9a69f9769c7fffb9cde1631fdcc73f6ea1ff0fd597adb1342c4847e4d0071
166 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 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://ponafet.ru/123?utm_term=metformin+tablets+ip+500+mg PDF link annotation
    • http://instgrmmverifiedbadge.com/68181659616wm28c.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloxezajaga/hjiheib/32854633176.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382953/normal_5fe11b680cce8.pdfIn PDF document text
    • http://managerprogram.live/drowned_river_valley_crossword_cluen2t3y.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/rVwVggg/88909085954.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/uuKjegg/ultimate_background_eraser_app.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/SibBzid/unicorn_comics_cards.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_6056194ec184b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_602d510e35ec1.pdfIn PDF document text
    • http://vajukadezazi.getenjoyment.net/40098545554.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/ergd9ij/lukasezojidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5fe79d792623f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_c62a28897f1f4cde913f24d64abbdb42.pdf?index=trueIn PDF document text
    • http://dapekafuxururo.myartsonline.com/union_budget_2020_18_highlights.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/best_book_for_ssc_cgl_english_vocabulary.pdfIn PDF document text
    • https://1dda4824-043e-406b-9213-03d4b91bb4d1.filesusr.com/ugd/7695bb_593393a844744813b40b0addeaef9f56.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_57a6e03835794a92b0008bebe4970e38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/korilo.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/habitat_organic_sheets_500_thread_count.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/angles_in_parallel_lines_worksheet.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/mama_do_you_love_me_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/appvn_apk_for_android_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/math_power_textbook_grade_7_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/76288801808.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 5632 bytes
SHA-256: 9e469fce194bff2735bd70304c85b504bfcd58fef1f92c8b2e70d52613a8e2f9
font_01_sfnt_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 10752 bytes
SHA-256: b7aaea6585fd6f5f48db7d22e9646c78c3cb307b416e3ae9c6877734a28c3cf1
font_02_sfnt_off00012947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12947 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1