Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c1cd726939c9dd…

MALICIOUS

PDF

82.9 KB Created: 2021-04-05 18:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d834b56ec77bf21e209d27f3d61a45ff SHA-1: 236b5ec62e6a8b8e8c8e028022412c48cbaafac5 SHA-256: c0c1cd726939c9dd87d0ef2e5c513aff399a5f8d9b5bc98fe4c07f9c2851234d
146 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, consistent with phishing or tech-support scams. While no scripts were explicitly extracted, the presence of external URLs suggests a potential for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://midufefew.ru/strik?utm_term=baby+trend+double+jogging+stroller+wheel+replacement PDF link annotation
    • http://lg-copyrightforms.com/chrome_browser_dark_theme_androidxju2z.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/fuKhaih/status_video_tamil_download_for_whatsapp_sharechat_funny.pdfIn PDF document text
    • http://gomunawuwox.22web.org/japanese_to_english_basic_words.pdfIn PDF document text
    • http://pushbiz.fun/fitafidoz4.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/57hghdI/anaconda_snake_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/vedoreket/fjgihfk/99901295831.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/sjhhgg9/character_appearance_generator_5e.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/d3knZ4Q/plants_vs_zombies_xmas_download_mac.pdfIn PDF document text
    • http://bioforcecolumbia.site/android_app_package_name_listqkudg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f272bf5-d31b-4fba-bad0-28b1356189ef/lewadipatelugofonaxaju.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/16220164643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/918a903b-d27c-4d01-88e8-0ec97addc7f4/95252480938.pdfIn PDF document text
    • http://jarawujutuva.epizy.com/rumafavaxotabuxefotunub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204909c9-a771-473a-b70f-259b63823cb3/honda_accord_transmission_fluid_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d1f476-1a05-4f7e-8799-2ae5f517deaf/principios_de_la_economia_gregory_mankiw_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/39582602856.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/23722469490.pdfIn PDF document text
    • http://tirevotijo.epizy.com/columbian_exchange_activity_packet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/sydney_secondary_college_balmain_uniform_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/xuvugonivug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a371be-3346-4a21-bdcc-24aaa39bbfc0/portland_1750_psi_pressure_washer_wont_turn_on.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_off00010201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10201 5948 bytes
SHA-256: ee559dca484dce0efe971687d2032a96dcfac5cee0789f2ff179c4004471347b
font_01_sfnt_off0001162d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162D 11672 bytes
SHA-256: 2c565ba6334b8496e9d6ca434aadf66dad33adbf08f8e0fb9eba079a2fd5c0f5