Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8293203babf8407…

MALICIOUS

PDF

81.5 KB Created: 2021-03-26 09:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 33883f2b27684e719f54cbc851217214 SHA-1: 96b9a728e420d6333ec7940a73ee3ddb300cb269 SHA-256: e8293203babf8407674edf8e889c418e52ebed3c7003d99fa51a6b0daa42aa7f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by 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 0.9996

Heuristics 5

  • 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://golowaki.ru/wix?keyword=sprinter+hacked+unblocked+66+at+school PDF link annotation
    • https://sinitilelimokiz.weebly.com/uploads/1/3/4/3/134348988/segidusizav.pdfIn PDF document text
    • https://vejiledulibona.weebly.com/uploads/1/3/4/3/134318828/sotuw.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/puCggYk/31448507614.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/e9eJltz/59410080679.pdfIn PDF document text
    • http://sedouche.xyz/jane_norman_abc_reporterlodm8.pdfIn PDF document text
    • https://bixoriwapavam.weebly.com/uploads/1/3/4/7/134731951/zobesowabitog.pdfIn PDF document text
    • https://polepufexiri.weebly.com/uploads/1/3/1/3/131379743/sezukikelo.pdfIn PDF document text
    • https://tasekesin.weebly.com/uploads/1/3/2/6/132695719/rejajiwedibafujoz.pdfIn PDF document text
    • https://panonalosisewe.weebly.com/uploads/1/3/5/3/135316392/f109c.pdfIn PDF document text
    • http://xtina.online/59510139202akz50.pdfIn PDF document text
    • http://carinsusa.com/muzusenupofomixarijuniv948a.pdfIn PDF document text
    • https://cdn.sqhk.co/tudakesovif/igchcJe/affiliative_leadership_style.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/ijhefVz/87609176526.pdfIn PDF document text
    • http://smartycredit.info/nusagirelapipujevarenirsxe.pdfIn PDF document text
    • https://fefokivaz.weebly.com/uploads/1/3/0/7/130776727/9546964c.pdfIn PDF document text
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/8c730.pdfIn PDF document text
    • https://sikezenubotimer.weebly.com/uploads/1/3/0/7/130739875/pezujagerudovigura.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • http://busurman.space/45387659365tzcnx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF2 5504 bytes
SHA-256: ecd0e6854f5f865eb3e555e23fd703bbf8129a3af329ef0dc6d8c7fb6c8c4660
font_01_sfnt_off0000ee84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 10692 bytes
SHA-256: 68aa3d447e57678592a5d0ff47aa6b239375b7efa6f8f036b2a35581f703ca0f
font_02_sfnt_off00011354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11354 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off00012881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12881 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f