Malicious PDF — malware analysis report

Static analysis result for SHA-256 710f4e10639c3960…

MALICIOUS

PDF

91.1 KB Created: 2021-02-17 22:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 874959e7906e9695937c876063f103d3 SHA-1: 981b3db289673758db9b1874fb07f9fc661da6a5 SHA-256: 710f4e10639c39603a986aa8b902d50c4c22eb2458abf334e73b0c5d1ab85ae2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://baarspo.ru/123?utm_term=flying+fairy+instructions+espa%25C3%25B1ol PDF link annotation
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/5e0781ec1.pdfIn PDF document text
    • http://gemavutod.22web.org/fopusubitezovuda.pdfIn PDF document text
    • http://famafivas.iblogger.org/tft_item_combo_cheat_sheet.pdfIn PDF document text
    • http://aycotoro0.xyz/arma_3_altis_life_rebel_guidexowi8.pdfIn PDF document text
    • https://relowuforobelo.weebly.com/uploads/1/3/4/5/134528439/ca8d8e9a675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_6018d3ffd7fec.pdfIn PDF document text
    • http://dkblogin-de.best/arithmetic_geometric_sequences_maze_answersgqaqz.pdfIn PDF document text
    • https://bavanakeburosot.weebly.com/uploads/1/3/5/3/135302165/mudaki.pdfIn PDF document text
    • https://lavozeto.weebly.com/uploads/1/3/0/7/130775819/eb6f57.pdfIn PDF document text
    • http://zedukibawubige.22web.org/anno_1404_venice_starting_guide.pdfIn PDF document text
    • http://ukranews.icu/kilobipupisazavoi6d7s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lizuratudesaxop.epizy.com/xsplit_broadcaster_full_version_free.pdfIn PDF document text
    • http://fabonek.rf.gd/70440219266.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012f53.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12F53 26228 bytes
SHA-256: 7c68a6574c3ae266f4bfec84c748d9958ceab5a4e999af01eb764d98df5dc966
font_00_sfnt_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 5452 bytes
SHA-256: 5d7605c67d361f96541e1b63a37442d7c8844ad9fbe5166cf03d6828b1e18a29
font_01_sfnt_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 18272 bytes
SHA-256: 7149836bce88c1dfc5c01864baed6b7cf0455502efd82a542e526914f5d93add

Open this report in the interactive analyzer, or submit your own file for analysis.