Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ee958b6c3490e1…

MALICIOUS

PDF

75.7 KB Created: 2021-02-18 07:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 66e5fbab5cdeda8c09fdb2e266c0ce99 SHA-1: 6db6ebc1e5956f9fbdc748d23f3d5bd86f83b448 SHA-256: 95ee958b6c3490e14265feee5be8fd0a1f83c14141f1ca3d64cefb977a15b889
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure and link farms, indicating a phishing or malware distribution campaign. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to malicious sites, likely for credential harvesting or further payload delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=2014+ap+calculus+ab+multiple+choice+answers In PDF document text
    • https://cdn.sqhk.co/lakivasulis/akegd4z/tofudububupopifaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/gdjaW8x/28377558362.pdfIn PDF document text
    • https://cdn.sqhk.co/zavipudajose/1jehg21/sssniperwolf_house_in_bloxburg.pdfIn PDF document text
    • https://niladituzisum.weebly.com/uploads/1/3/4/7/134736231/5704961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_601f3fa588458.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/1yjijfV/celebrity_cruises_ships_itinerary.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/Kncgihc/10591259626.pdfIn PDF document text
    • https://gupebuxoguwev.weebly.com/uploads/1/3/4/3/134381402/5552180.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/43298109701dcuma.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/gtihXhh/cut_the_rope_experiments.pdfIn PDF document text
    • http://tehnotop.site/bnmit_full_formrvgkx.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/zkibhfw/90s_alternative_music_video_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/e9OJxgc/33318423640.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/Y4gf5kY/38385014348.pdfIn PDF document text
    • https://cdn.sqhk.co/pelebitebi/3MKLgiH/botal_bhar_daru_chadi_dj_mp3_song_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413693/normal_6018a0b13ca62.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6B 5724 bytes
SHA-256: 601eafb50c14e3b732064f873e1b7bfaa5126fae55da08267391173a57ddc05c
font_01_sfnt_off0000eec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC8 15660 bytes
SHA-256: 9bf323a26097a4dc6f1a7a1edf269d61f46873c65ef6790165e5f56485301281

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