Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab8cfd0754a1218…

MALICIOUS

PDF

76.2 KB Created: 2021-03-20 06:10:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d154de705648b5b14b513a6052a8d3f SHA-1: 9beabcaf64d6be2b50e6bcb119cb1e12b403f39d SHA-256: 3ab8cfd0754a1218317457f69a27195f28d9b446c08b50c5b14be30ce9675980
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://zajinet.ru/wix?keyword=st+dorothy+school+chicago PDF link annotation
    • https://cdn.sqhk.co/gufezitaxato/gKggpx9/fallout_shelter_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_604359866935f.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/c4888416ca08df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_602ed1ebd1e86.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/g8HKHqh/makexezilado.pdfIn PDF document text
    • https://gariwadol.weebly.com/uploads/1/3/1/3/131380788/6585844.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/hdhgOgd/64359395825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_602096add4de8.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/f80c0cb1a2f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501486/normal_604508d2db486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_602fb851b54c2.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/Pidfzig/50181159480.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/c85c6c5f-6e3f-4104-a48d-9bbbbcc03692/45072149749.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/vonefezarowibafuwamuzesug.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/92132067584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5dd5b7-8983-4cd9-b04c-8d88499b6c3b/34242642368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b951ff-c481-4a3a-9480-4eb7d6af1c7d/72294954897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eefd936-9429-4b87-a277-9353a7ca35ea/is_disney_plus_available_on_samsung_smart_tvs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1759e76-6384-4eb9-b804-bed5393a24ba/us_postal_form_3600-ez_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52bdd1dd-f524-4399-9ddd-8171f1e4504f/foxaxukokizobonuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b2b7111-10ba-457e-8420-7228ffdc0856/66810461960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe68f401-81d7-4028-9568-56bdc4d8b9c0/busatojid.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 5404 bytes
SHA-256: a162a30a00fcd210bfcc2f156adc631403d3fa679a444d8d9d0937283163c5ce
font_01_sfnt_off0000fd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5C 11224 bytes
SHA-256: 662359109553f819d4f7cf2516fbe44ecb39a92615041beb96fd5018e28238dc

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