Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bddfa78ea200325…

MALICIOUS

PDF

79.7 KB Created: 2021-01-13 01:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 167981afe92eecd3c20bffb4a44ee530 SHA-1: 2fab4776d62d1c763b1e7749bd8b017cdeca64f1 SHA-256: 1bddfa78ea20032553171e0c44f391ea28419d7e321e1e9001c555c5d313db80
126 Risk Score

Malware Insights

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

The PDF contains multiple external links, with one prominent URL pointing to a suspicious domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=the+underground+history+of+american+education+volume+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426815/normal_5fc0f44c653ca.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/5145133.pdfIn PDF document text
    • https://site-1177942.mozfiles.com/files/1177942/24311956274.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/fuzofodugusivunosit.pdfIn PDF document text
    • https://site-1174310.mozfiles.com/files/1174310/43331838101.pdfIn PDF document text
    • https://site-1171472.mozfiles.com/files/1171472/admin_login_php_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f9c3c6b1adeb.pdfIn PDF document text
    • https://site-1166625.mozfiles.com/files/1166625/53658876287.pdfIn PDF document text
    • https://xidelesa.weebly.com/uploads/1/3/4/4/134498911/powax-devow-jugunogadepasu.pdfIn PDF document text
    • https://site-1172122.mozfiles.com/files/1172122/eye_of_the_storm_fortnite_storm_awakening.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/jokotaziweluge/chaalbaaz_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/bodepova/pumureresip.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_off0000f816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 5676 bytes
SHA-256: fdbabbdf92473580c4903ccb731af9d4e9c4aa91cd398c0eb73de382d37e90d2
font_01_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 11260 bytes
SHA-256: 7076a40b6749b4217a963788980320f2d4a6e9dbba19ff5738aef1155b6c1b98

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