Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a297147e01b98b3…

MALICIOUS

PDF

74.3 KB Created: 2021-03-10 06:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45c4a4cc1c75c080700f5968c51d485c SHA-1: 59b1497303dd6ad5c093e3b5a2a7ad924c192f1a SHA-256: 3a297147e01b98b3cfcc0c38e6a14fed8a32c01d1b7b09a0f458a53cf8a9e3ad
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 0.9990

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://golowaki.ru/aws?utm_term=ccnp+route+lab+manual+version+7+pdf PDF link annotation
    • https://xovozenoz.weebly.com/uploads/1/3/4/3/134348708/403328.pdfIn PDF document text
    • http://welogotodamiris.22web.org/write_decimal_in_words_worksheet.pdfIn PDF document text
    • http://wosidigelime.iblogger.org/a_histria_de_geometria_euclidiana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491723/normal_5fc9dbcb737cb.pdfIn PDF document text
    • http://muluwusive.22web.org/fuxowamupezixotoxizisujol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479224/normal_6019807067974.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375210/normal_5fe315011bd13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480899/normal_5fe440b1f38d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366351/normal_5fc8456baed97.pdfIn PDF document text
    • http://renijulemigato.iblogger.org/rawefizopopomejewuteza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5ffa31ce98ff1.pdfIn PDF document text
    • https://bexokafosirur.weebly.com/uploads/1/3/2/6/132695536/1175548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_601232474761e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388271/normal_5fde26226af7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483338/normal_600ecc50ba6f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384316/normal_601ba6e08758b.pdfIn PDF document text
    • https://feselezoretun.weebly.com/uploads/1/3/4/6/134690260/tudemisoluletitig.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/bugutaj/87718157592.pdfIn PDF document text
    • http://xuwunokebisul.rf.gd/bebofoxij.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/android_9_bloatware_entfernen.pdfIn PDF document text
    • http://lejuwugumiwa.epizy.com/70726793107.pdfIn PDF document text
    • http://xonikinoforekan.rf.gd/tower_of_nero_release_date_germany.pdfIn PDF document text
    • http://kusogit.rf.gd/93904914243.pdfIn PDF document text
    • http://lituvatitibew.epizy.com/atlas_air_crash_ntsb_report.pdfIn PDF document text
    • http://vilewol.epizy.com/american_action_movie_video.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_off0000e267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE267 5484 bytes
SHA-256: 91b61c683d4b1f1d08f3f684042e83d0f6725248959845b419c58fd0f572f85d
font_01_sfnt_off0000f4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 11244 bytes
SHA-256: fe81ab64b4864e078cda8cae5780040f7b41bf2e3ec54dbaf5eb22cc383d74be

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