Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc4ccef9fc864ea…

MALICIOUS

PDF

84.1 KB Created: 2021-02-08 09:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fcb5349fe28ee9bfc0941e9f596b0d65 SHA-1: 00de5eb8ebdc77c6c6d8143ea248b03ae7b39ef8 SHA-256: ccc4ccef9fc864ea571892a53c35ab4af8fec048a8d3a2b0454d600eeba002f1
126 Risk Score

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 0.9998

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://jottigo.ru/aws?utm_term=double+size+bed+sheets+walmart PDF link annotation
    • https://jizenovu.weebly.com/uploads/1/3/4/6/134682428/raxisogadel_tizovon_fijixamip.pdfIn PDF document text
    • http://andyhong.blog/dukeluretokilanef11et.pdfIn PDF document text
    • http://natur-bio.space/lenovo_laptops_thinkpad_costco80sng.pdfIn PDF document text
    • http://debesur.iblogger.org/rumifofijerudemabalepexe.pdfIn PDF document text
    • http://dovamemowiruz.iblogger.org/samsung_android_mobile_phone_under_3000.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/cWwv01s/football_manager_2020_mobile_download_ita_gratis.pdfIn PDF document text
    • http://rujokevawevi.22web.org/why_is_chloroform_not_soluble_in_water.pdfIn PDF document text
    • https://dikarofojosej.weebly.com/uploads/1/3/3/9/133988548/1292031.pdfIn PDF document text
    • http://pannochki-art.com/fexigalokejadnw1b.pdfIn PDF document text
    • https://kekageguva.weebly.com/uploads/1/3/0/7/130776826/61623f1.pdfIn PDF document text
    • https://cdn.sqhk.co/mivufarowiwi/AyM0hhx/dobasifelum.pdfIn PDF document text
    • https://piworanup.weebly.com/uploads/1/3/2/6/132681558/vevuzobakab.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/18198188935.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiduxoz.epizy.com/jufebefazixigex.pdfIn PDF document text
    • http://xebowuruno.epizy.com/jexamamarirolepofen.pdfIn PDF document text
    • http://gorevifero.epizy.com/meraxadux.pdfIn PDF document text
    • http://femavumifixomud.rf.gd/nizemiporamesumanupijas.pdfIn PDF document text
    • http://sosagid.epizy.com/intersection_of_two_lines_worksheet.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_off00010b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B94 5348 bytes
SHA-256: 7e228bb810253ebfc6cc675df43a9ae3f3b59b4fed3bf6bb3ce6b7d6b3eeaafc
font_01_sfnt_off00011da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA8 10956 bytes
SHA-256: 9920ffccbb5c825cab79c453f4d8547d32a812e9dac0b835d788923771a04db3