Malicious PDF — malware analysis report

Static analysis result for SHA-256 06853438a3f92b35…

MALICIOUS

PDF

74.2 KB Created: 2021-02-26 10:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06a484f37d0c07d87472ca86a00ce336 SHA-1: b357b43166bab8b2c981289eda8c218d24c5d68c SHA-256: 06853438a3f92b352670f8ace392730ed60abbad2328fc97c538238a0b0d94b3
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating a link farm with numerous external PDF links, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further confirm its malicious nature. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful content.

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 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/123?utm_term=scrabble+rules+use+all+7+letters PDF link annotation
    • https://cdn.sqhk.co/jawutuwek/WiRjicB/gavadosipow.pdfIn PDF document text
    • http://sadanojigoma.22web.org/73112311173.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/iUFOdhj/jumokibapadefepavo.pdfIn PDF document text
    • http://lasabobobatir.22web.org/final_cut_pro_10.4.6_trial_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/iiAsRjb/59561050047.pdfIn PDF document text
    • http://siwarezowagi.iblogger.org/avery_8_tab_dividers_template.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/wopavetub-lugejopovadib-xivasifeluwel-bavip.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/gJvSYgj/sinajagumuwopefepe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivikabazixo.epizy.com/lufabinozekuba.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/nawozebotufagudokom.pdfIn PDF document text
    • http://dosidojabar.epizy.com/cisco_anyconnect_mobility_client_free.pdfIn PDF document text
    • http://ragepipajuwase.epizy.com/battery_powered_radio_energy_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/alegria_cirque_du_soleil_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/undecimated_discrete_wavelet_transform_in_matlab.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/4560294666.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/windows_10_1903_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/lugged_bicycle_frame_construction.pdfIn PDF document text
    • http://dowegumorugujon.epizy.com/13036627737.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/burger_king_logo_font.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_off0000e4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 5116 bytes
SHA-256: 8c2365a9e7e209457ad87f02eb8dfefdaf1d10be8367ee436fe51bceda78f38f
font_01_sfnt_off0000f677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 10752 bytes
SHA-256: 4dfcb3c747baa09be56ee0db920cb0fd44c792ca7f3c115d2e1cbd3d6072439b

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