Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cbf510499ec850…

MALICIOUS

PDF

79.1 KB Created: 2021-03-27 22:23:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a4d4b9ceac02cfc8f6b6f48f6ef0a8ab SHA-1: b17a6e2405738c46011efdec088d3d3b89aee029 SHA-256: 19cbf510499ec8507fdc44a64dbed856047e029e4a6ec9ba8b70541fca4860ab
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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
  • 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://gimoguvi.ru/strik?utm_term=does+dunkin+donuts+have+breakfast+bowls PDF link annotation
    • https://cdn.sqhk.co/dovoxukeni/uiaWiaq/hobby_lobby_locations_in_minnesota.pdfIn PDF document text
    • http://copyrightsupport-ig.com/50504689318vdmxh.pdfIn PDF document text
    • https://nivuzodix.weebly.com/uploads/1/3/1/4/131410872/letadikos_fesiviw_fokepim_tesalemenajewax.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/gatetugopi-mawupebepawud-vakagelegol.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/CPj4Jhi/70291817353.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://xebejadeveroj.weebly.com/uploads/1/3/0/9/130969735/jomedusema-jimili-gakojajufajobil.pdfIn PDF document text
    • http://buylettersonline.com/vizogelelidot719zw.pdfIn PDF document text
    • https://kaxuzuditad.weebly.com/uploads/1/3/5/3/135310968/wurumeraka.pdfIn PDF document text
    • https://nebolizeluxofid.weebly.com/uploads/1/3/0/8/130874408/2470315.pdfIn PDF document text
    • http://antileqphh.site/the_red_queen_summary2q8g7.pdfIn PDF document text
    • https://lesesagipamagaz.weebly.com/uploads/1/3/0/7/130739561/sefenos.pdfIn PDF document text
    • https://purubagenipobeb.weebly.com/uploads/1/3/1/3/131398544/feguw.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/kezemiradigu/understanding_body_language.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/bootstrap_user_profile_list_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d284d6-71fb-4c5b-a6c3-ad3d9e2b04a1/jirepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614b5894-fe85-4f77-a47e-2452523c1c70/liver_detox_diet_foods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be99865-1eca-4aca-8a6a-9c4faa68528c/what_age_group_is_nate_the_great.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385aa5fe-17ec-427b-aa2b-f911cb4a6adc/63355360828.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_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 5348 bytes
SHA-256: fd9fd27dd55f6f1435013a739827da59c0663151613cf30384ad9bfab141ef32
font_01_sfnt_off000106d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D4 11236 bytes
SHA-256: d6744b6c9fde49fa8ce9fe4ee6aedf17cb250cef595133c43d084fce9d9d5d41

Open this report in the interactive analyzer, or submit your own file for analysis.