Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84c600b6579dbb2…

MALICIOUS

PDF

69.6 KB Created: 2021-03-02 19:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b3f2450ae6cacf72808bc5ed63d4819d SHA-1: 66503702ad675a2794f85dc9f0feb83928445d34 SHA-256: a84c600b6579dbb20a2de8346a41c4fa7e93cdb8ac9113687624c66e385604ec
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/wix?keyword=barron%2527s+ap+human+geography+pdf PDF link annotation
    • https://cdn.sqhk.co/digipexula/XnYidgc/67131575029.pdfIn PDF document text
    • http://winoorama.site/22583765538vyauo.pdfIn PDF document text
    • https://cdn.sqhk.co/zewezerezi/ijZJDuA/light_me_up_rl_grime_lyrics_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475875/normal_5fcb24e45ae78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_60375ccba9cc2.pdfIn PDF document text
    • http://oneitstore.pro/starbucks_barista_training_videosnnlxf.pdfIn PDF document text
    • http://znalomstvavip.site/android_9_pie_samsung_s5qw0t1.pdfIn PDF document text
    • http://exemplpusj.com/php_form_action_submit_button0lux7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454054/normal_6028fff1ac8c3.pdfIn PDF document text
    • http://migunovaj.iblogger.org/uterine_cervix_transformation_zone_not_visualised.pdfIn PDF document text
    • https://cdn.sqhk.co/waladoved/jBgcfw7/north_south_expressway_malaysia_map.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/gjeidoG/bojelara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448750/normal_601ae24ed7c79.pdfIn PDF document text
    • https://cdn.sqhk.co/nalomuxe/N2QF2jg/ff_live_streaming_hari_ini_persib.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/63208124347.pdfIn PDF document text
    • http://freehookup.xyz/bootcamp_windows_105iyun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tokozod.myartsonline.com/rubovexudab.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/72439480783.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/30051027183.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/83012073343.pdfIn PDF document text
    • http://xuvaduw.epizy.com/bahubali_2_video_songs_tamil_kuttyweb.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/67982913390.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_off0000d34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34D 5608 bytes
SHA-256: 8c3e48372de679626d61777cfe75940f4d3d066e821945b88ec94b1f7787e561
font_01_sfnt_off0000e64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 10196 bytes
SHA-256: f1211028d6e3d6e3d33e6cd7df92da638258c4350c25ea88c0c49fd367b8df97

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