Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96a333b78a8dd16…

MALICIOUS

PDF

71.1 KB Created: 2021-02-14 18:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2dd4593d091d9e6b335471766c897dbc SHA-1: c504c16d5bac8565e6ef5fc1f69dcead033dfc5e SHA-256: e96a333b78a8dd16d4120552df5bf6c180254adbb567f85f52fa0ddc1f4625e0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains multiple embedded URLs, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text fragments related to search terms, suggesting a phishing or scam lure.

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 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.
  • 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/123?utm_term=avondale+school+district+auburn+hills+mi+48326 In PDF document text
    • http://1gusevshop.space/sirekugasosibinavffvbh.pdfIn PDF document text
    • http://twobigs.space/46599339357tv7fc.pdfIn PDF document text
    • http://wide-do.top/city_build_craft_exploration_of_big_city_gamesr8lq9.pdfIn PDF document text
    • http://localdesign.me/63174130058y3ngw.pdfIn PDF document text
    • http://obschee.xyz/26539713656s6uo9.pdfIn PDF document text
    • http://generalmassage.online/198708467650n75m.pdfIn PDF document text
    • http://detonic-deutschland.website/bow_tie_analysis_template_freecxfbh.pdfIn PDF document text
    • http://vekenuv.iblogger.org/nused.pdfIn PDF document text
    • http://autoupgrade.website/naviextras_update_code60u32.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/fapaga/kivunutuguvakezomebimiwit.pdfIn PDF document text
    • http://kiderirujefadag.epizy.com/95712469568.pdfIn PDF document text
    • http://rijujala.epizy.com/81594179750.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/sizolelonavesofosa.pdfIn PDF document text
    • http://vanumezaxibet.rf.gd/s_e_a_t_o_full_form.pdfIn PDF document text
    • http://topadut.epizy.com/fowipam.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/autobot_tailgate_transformers_prime.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/job_offer_email_template_uk.pdfIn PDF document text
    • http://subutolibi.rf.gd/spider_man_1_game_psp.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_off0000d35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35B 6100 bytes
SHA-256: 4b967eb4208114d950fe49a3a9ebd4afc4f96a8a21e6b4added68f17647d2d1f
font_01_sfnt_off0000e7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F8 11428 bytes
SHA-256: 25f9358b88704335ef26256fc4e609af74f46eafb03689fae3c079056874b9f2