Malicious PDF — malware analysis report

Static analysis result for SHA-256 2070dd54c2f22964…

MALICIOUS

PDF

78.5 KB Created: 2021-03-03 08:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5a65925be1c2c659ceb421840d60e185 SHA-1: 877f40480fa8d8eacd3bb7118d476a014cd538c3 SHA-256: 2070dd54c2f229646a9ea6d82e01c5844167699626725ee7ef036febf64bc872
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a common tactic of using documents as bait for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ponafet.ru/award?keyword=libro+de+fisica+1+bachillerato+3+semestre+pdf PDF link annotation
    • https://cdn.sqhk.co/wifopuzuxiba/deexsuY/zombie_ultimate_fighting_champions_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/ji7MUzG/33668781781.pdfIn PDF document text
    • http://kraftmann.su/76032190230t326.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/baQbdha/wordpress_download.pdfIn PDF document text
    • http://trokot-new.online/archaeology_anthropology_and_interstellar_communicationqqasl.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/C1jdib7/danelow.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/gj0hj3n/36759200239.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/QfM1hiF/7380835264.pdfIn PDF document text
    • http://haifaiv.ru/the_mystery_of_the_shemitah_free_download7cma0.pdfIn PDF document text
    • http://rimka.xyz/what_does_discerning_of_spirits_mean_in_the_biblekmz0w.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/bHajiYg/phoenix_airport_car_rental_map.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/340292b0.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/the_mill_on_the_floss_english_rose.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/i9Ehige/46619302479.pdfIn PDF document text
    • https://regamozinog.weebly.com/uploads/1/3/0/9/130969170/bovekevaje_pusazavesubu_xugajif.pdfIn PDF document text
    • http://manovina.mypressonline.com/selling_for_dummies_tom_hopkins_free.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E9 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 5692 bytes
SHA-256: c5cbee15adda97249f6a73c0e3399dd3b159aac90974275bc59692d94418731c
font_02_sfnt_off00010510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10510 11536 bytes
SHA-256: 01e258d50d2c41bfc7545fe97ae417ead75b128258b63356f57552251e76ec06

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