Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a16d7f2eb91014…

MALICIOUS

PDF

72.9 KB Created: 2021-03-11 04:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36f3179bb96fdac85bc5a8d6ce43e5b7 SHA-1: 975db6ffb8e51311e473611343f92154eb7e0a24 SHA-256: 06a16d7f2eb9101497979378f4eb4f4506a34645a4621b1728c081c91a150e5b
186 Risk Score

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/award?keyword=the+aeolian+islands+volcanoes+pdf PDF link annotation
    • https://vabeluzaxudi.weebly.com/uploads/1/3/4/8/134884936/betetifefuxiror.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/30396920891.pdfIn PDF document text
    • https://pefipufipukota.weebly.com/uploads/1/3/4/0/134042651/9497737.pdfIn PDF document text
    • https://sugasukeni.weebly.com/uploads/1/3/4/8/134878852/4178256.pdfIn PDF document text
    • https://jitifawe.weebly.com/uploads/1/3/5/3/135327084/2b45ff01939.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/barron_s_sat_math_2_12th_edition.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/ribuwu.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/piwiki.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/1d2a1d06-2ecc-47d0-8a21-314dfe6fbdbb/60804789365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b395e7e2-6c05-4258-a595-5784e2dd4638/att_velocity_prepaid_mobile_hotspot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d8fcbd-4e24-426f-a930-10ed7f4d2bec/divuxitej.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/wezawujisadudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f4d02d-5da6-4fe7-9696-833f17cda46f/ralopolupenekenubiwomumiw.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/anjaana_anjaani_movie_video_song_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96be4aba-f004-4816-997a-9fbf039b1f43/public_relations_degree_open_university.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/50525437691.pdfIn PDF document text
    • http://zonurupadul.atwebpages.com/what_is_maritime_law_in_disc_golf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec3bc26-c901-41d8-9e57-230aa163a6ce/34222354417.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/tamilrockers_malayalam_angamaly_diaries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de435eb-08cb-4825-8dfe-6e6af8ae0669/19489939697.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7A 5156 bytes
SHA-256: 29f6cd465525a3ebf2371e5fef22f6250514be41d94235e61ed352aca2c7e922
font_01_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 11032 bytes
SHA-256: 8818053938498371eef5eb47c7b1e807ca35230faeffe873ad367d569b761ecd