Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa068fcf5989bf3e…

MALICIOUS

PDF

71.3 KB Created: 2021-03-08 07:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 33a4345dabf99759874ab1c954abbc59 SHA-1: 5145f328492b46446e894f70e38c15549ccfdb01 SHA-256: aa068fcf5989bf3e10e56e25a13970550e1af6d41ed6d4b12dc0a0de5e0fe2c6
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to exploit users.

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://golowaki.ru/strik?utm_term=ruger+lcp+2+viridian+laser+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423136/normal_5fc97a275897d.pdfIn PDF document text
    • https://cdn.sqhk.co/wudarivat/hg3ia0K/your_texas_benefits_form_h1200.pdfIn PDF document text
    • http://smeh-mif.space/21908905495lrkb0.pdfIn PDF document text
    • http://supermagazforsale1.xyz/bagipewufosowivi9bt62.pdfIn PDF document text
    • https://cdn.sqhk.co/kokojisip/ilzcjcb/31628054691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_601ef5a4d83d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369774/normal_5fe064197c650.pdfIn PDF document text
    • http://weinmvc.net/zitidusaa86.pdfIn PDF document text
    • http://kulinar2020.site/kokokexasujeromefulf7dp.pdfIn PDF document text
    • http://meetsucre.pro/rowesroebr.pdfIn PDF document text
    • http://razvivatel.blog/rowunolanajuruzijopif7dkwt.pdfIn PDF document text
    • http://extraterrestrials.space/vudobokx70i9.pdfIn PDF document text
    • http://titanovyi-filtr.ru/2020_nsw_school_calendar7a4j7.pdfIn PDF document text
    • http://varistop.site/diy_goatee_template3r2pt.pdfIn PDF document text
    • http://civiliscmq.online/spring_4_tutorial_mkyongyyqo5.pdfIn PDF document text
    • http://hangookoil.ru/81699319087kb00b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_e5b7db35959b4c64b5f72633030425f9.pdf?index=trueIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_9da13156b96148368117cfe3a545a2aa.pdf?index=trueIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_70df17ff61214696937d7009884b29d6.pdf?index=trueIn 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_off0000d9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 5532 bytes
SHA-256: d5f558bc2c7d68e217f7b4e39b4bef17de6a6fcc09d9940df3a9beefe7e0330c
font_01_sfnt_off0000ecbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 10312 bytes
SHA-256: ec88b3c9a3eba95a21afd8386c9fc02d781ac41ae1b42296d2778a5a8ed1af20

Open this report in the interactive analyzer, or submit your own file for analysis.