Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d0678cfc94d0bc…

MALICIOUS

PDF

99.4 KB Created: 2021-03-24 00:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f1b01c14039bc850c5c5104ce4e94e75 SHA-1: 2da82a672e6feef95425525c3300f934b6403665 SHA-256: 74d0678cfc94d0bc3cd5dd0db39d612d137d8d4c066b33c8ad70585becf7147c
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable or unknown hosting. Heuristics indicate it functions as a link farm, with a high ML score and ClamAV detection confirming malicious intent. The embedded URLs likely lead to phishing sites or malware downloads, aligning with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/award?keyword=anglo+norman+literature+pdf PDF link annotation
    • http://reawont.online/carry_on_avenged_sevenfold_lyrics_meaningmh4s6.pdfIn PDF document text
    • https://zavomori.weebly.com/uploads/1/3/4/3/134335150/6418147.pdfIn PDF document text
    • http://gijixig.22web.org/xuzuxuko.pdfIn PDF document text
    • https://majosipodolonax.weebly.com/uploads/1/3/0/8/130814003/xobitonasisosomif.pdfIn PDF document text
    • http://exemplpusj.com/zakodedikadorevewanu96hug.pdfIn PDF document text
    • http://maxoranano.sportsontheweb.net/4154365543.pdfIn PDF document text
    • http://luminar3-download.xyz/how_to_clean_a_crane_ultrasonic_cool_mist_humidifier1nnum.pdfIn PDF document text
    • http://callipakk2.site/vokelada1a1ws.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/rutizipo.pdfIn PDF document text
    • https://jinuvavuvebox.weebly.com/uploads/1/3/4/6/134612635/mufigeximo-gezigufas-padigu-fezaj.pdfIn PDF document text
    • http://fenofaxizuva.22web.org/haier_dc_inverter_ac_remote_manual.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/vakazipufud.pdfIn PDF document text
    • http://stankovit.ru/17267378791xgx9j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://papitanado.rf.gd/crack_ielts_in_a_flash_writing.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_d208a0735fe64a71b19f91f592628577.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/football_themed_powerpoint_template_free.pdfIn PDF document text
    • http://sosefamip.epizy.com/45952863677.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/how_does_novatel_mifi_work.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/biology_lab_manual_class_11_ncert.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/13270071932.pdfIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_8d40fbc772eb4e518746d24d13d624c4.pdf?index=trueIn PDF document text
    • http://pijedawometuzov.epizy.com/xupogen.pdfIn PDF document text
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_832312f27faa43218c3434669a3f9daf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/mokugakese.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_off00014352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14352 5172 bytes
SHA-256: 3087a7e98524a3bad4ab674d4971f5bc1a0df7213e118b53b4a5ddec6cc140ee
font_01_sfnt_off000154d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154D8 13344 bytes
SHA-256: 883689264390873c1fb1e1ab9381e154d46f739147ed9c5e7ff91af31a317735

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