Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cde5e6db9c6551…

MALICIOUS

PDF

90.1 KB Created: 2021-03-25 16:35:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4486a7ab18ded2521a61af2f0d763836 SHA-1: 542c57b2d91e7e6c7ec9810c0dad5ba41748ab5f SHA-256: 74cde5e6db9c6551e722523f7ff2e999803e7f186fc4a43d5156414d5c46789d
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://maypoin.ru/award?keyword=asas+agama+islam+pdf PDF link annotation
    • https://dalujukonuxuda.weebly.com/uploads/1/3/1/1/131163933/bosuloguxudu-pojenobamiju-mokapiwejokepom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_603136f9b309c.pdfIn PDF document text
    • https://cdn.sqhk.co/fefavezevir/iaiihda/happy_birthday_wishes_songs_video_free.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/sedgewick_algorithms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485711/normal_5ff9dc79b0730.pdfIn PDF document text
    • https://gunatagopoma.weebly.com/uploads/1/3/4/8/134883211/8359260.pdfIn PDF document text
    • http://paktum.pro/dixuxoxat5hic9.pdfIn PDF document text
    • http://vimabanu.sportsontheweb.net/oceanography_merit_badge.pdfIn PDF document text
    • https://gobebirerelimi.weebly.com/uploads/1/3/4/6/134651667/125397e74c4.pdfIn PDF document text
    • https://cdn.sqhk.co/vabilafibalu/VKjehjN/51173899420.pdfIn PDF document text
    • http://zhigina.ru/87438308237m44sl.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/eJrQmbY/average_cost_to_build_a_house.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/tobida.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/xutazapewavedigubeku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6a2b6f-809f-4be2-98b8-eb2b129ddf4a/pujevuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b72e3f-e78c-48ea-ab1c-c601ff70070a/ge_appliance_repair_service_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a29c09-227a-425d-bddb-81817ffaf252/is_the_t_fal_actifry_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbdd5c0-024a-4774-aa3e-ab842305ebd1/82467400992.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_off00010c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 5256 bytes
SHA-256: ea03fb2947ec3cfdc9ca068d69c88e6193ed80dd66d2362155dd7de0ed910ab9
font_01_sfnt_off00011e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E49 10756 bytes
SHA-256: be0730d4e61aecbc37e37b2f804448e203a89f6f98c8e897156737515b09faae
font_02_sfnt_off000142fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FE 16604 bytes
SHA-256: a5c3e6ccb1cccb9c1d9cb4cb30b4b6c85cf5c6701747d4c43f7a56841a867bff

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