Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28008581529ec17…

MALICIOUS

PDF

163.9 KB Created: 2020-12-15 16:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5b3aa0c99fa2be7818f207dedfbc9917 SHA-1: 542ce52142aff2869eb0a4e7c92ffa35327dae51 SHA-256: b28008581529ec173e11547298de40c866e7cdcb6fbb5420eb05678592ce57db
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=archery+king+hack+tool'. The document body, though heavily obfuscated, contains references to 'archery king hack tool', suggesting a lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=archery+king+hack+tool In PDF document text
    • https://givudaxoj.weebly.com/uploads/1/3/4/4/134490896/209209.pdfIn PDF document text
    • https://sowuwiwegekop.weebly.com/uploads/1/3/4/4/134444151/voxomadesu.pdfIn PDF document text
    • https://zodaribidibukez.weebly.com/uploads/1/3/4/7/134716266/bivofewij.pdfIn PDF document text
    • https://seporulakokifo.weebly.com/uploads/1/3/4/5/134590723/makelukigedanaw-jumavi-zumanodak-lemale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410717/normal_5fb694eb48e6e.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/sinadi/jesus_christ_superstar_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/43364855340.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc188b1c89e1c4b8fc2eaf8/t/5fcad65811c29807e6cc312a/1607128666065/beginner_cross_stitch_patterns_free_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/14218672623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be21b1b-4a38-458a-bb61-ebddb0f82193/relative_harmonic_minor_of_g_major.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001de97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE97 5536 bytes
SHA-256: a25c9e71ea1a787f14f19bc4a1f2c9657febcbc11a070eabd556025052d8bf8a
font_01_sfnt_off0001f19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F19A 5040 bytes
SHA-256: 002eba567aff66c127858bdd0bad8441b2cf6151a9301a0187e6dffcd950f29f
font_02_sfnt_off000202c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x202C1 18380 bytes
SHA-256: e269bc1bfa3af7adab3934a231b8b58a6edc918d84a9507a4ef3e4796e681db6
font_03_sfnt_off0002395e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2395E 14640 bytes
SHA-256: 3657379e8a7ec82a2e942a8c5343670eba501433f1e2292a0cd8f6a81f2da8f9
font_04_sfnt_off00026889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26889 17232 bytes
SHA-256: 7ee4cd5041c47dea76322bbe5a62aecc99bfb76a0107ab9b955a2d3906c6d702