Malicious PDF — malware analysis report

Static analysis result for SHA-256 8425dbe824008fa2…

MALICIOUS

PDF

74.8 KB Created: 2021-02-09 10:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d918922c1768bc4f1ae24191329f5b84 SHA-1: fd9eb708b179159ae867faa4af0f7577a6ed5112 SHA-256: 8425dbe824008fa2d4fc220fdc9dd5887cba3f4953a4afcd6c70e13593c1fd06
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as part of a link farm or redirect to malicious infrastructure. The document body, though heavily obfuscated, contains text related to search terms, suggesting a lure to trick users into visiting these malicious sites. The presence of PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics strongly indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/aws?utm_term=bhagavad+gita+chapter+11+pdf In PDF document text
    • http://wazumitizun.22web.org/20462991151.pdfIn PDF document text
    • https://ginufadep.weebly.com/uploads/1/3/4/6/134668932/625050.pdfIn PDF document text
    • http://tihefers.online/39093436064j0slp.pdfIn PDF document text
    • https://rezusoroporinon.weebly.com/uploads/1/3/2/6/132695427/zepojone_lunupuniputuxo_lovuw_baruzatovaso.pdfIn PDF document text
    • http://lewodazegozi.iblogger.org/irmsa_2019_risk_report.pdfIn PDF document text
    • https://jisevudes.weebly.com/uploads/1/3/4/8/134882916/pubunewute.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/zejevexogojifu-sedoboluf.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/template_powerpoint_free_blood.pdfIn PDF document text
    • http://momentshop.space/wojivowehb2xo.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/tamobalasu/jopuwosorel.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/apple_music_apk_beta.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/birizejul.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/boy_attitude_status_video_english.pdfIn PDF document text
    • http://gawekavadave.epizy.com/of_mr_bean_videos.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/christmas_frame_template_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/bichagadu_naa_songs_com.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/muvujedenajikifebuwa.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_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 5368 bytes
SHA-256: 11a002b69519db562c3b5d2422d735c6ef50e6a80e01c1c3dec38021b6bf12ba
font_01_sfnt_off0000fbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC8 10052 bytes
SHA-256: b7b293cd6cab9abaa52a19faf1ac6ff7b7d8789cbcb6592ed1b7d52678718aad

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