Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74318cbd225007d…

MALICIOUS

PDF

73.4 KB Created: 2021-06-09 01:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4afeb5665a316e9a13c73d56bf68db38 SHA-1: c8500be0840b4a7af5536c1ef46f6d74fb377ab6 SHA-256: d74318cbd225007deb0a9e25375acacec3f0e191b14d50b9494b98b1ff5dc3e0
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, many hosted on disposable domains, suggesting it functions as a link farm. The primary URL, https://xezojetit.ru/123?utm_term=cadillacs+and+dinosaurs+3+apk, is likely used for phishing or to distribute further malware. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/123?utm_term=cadillacs+and+dinosaurs+3+apk PDF link annotation
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/nenuzixabiga-rexazupux-benilujesuzavuk-didiluvojosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_603185626e194.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381737/normal_5fff5be37cd1b.pdfIn PDF document text
    • https://bisitewo.weebly.com/uploads/1/3/4/4/134496646/fisalezeze_namaredodobi_zupazevopiv_wojexuzawe.pdfIn PDF document text
    • https://radelemetiwiwi.weebly.com/uploads/1/3/4/5/134520029/6132941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455380/normal_600ebdea0d58b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454988/normal_5fd6137cd9e58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365628/normal_5ff66a7ba2d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5fd3869052e0f.pdfIn PDF document text
    • https://jodawozuwiki.weebly.com/uploads/1/3/1/4/131437728/zadofawo_sajox_penof.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4413573/normal_60b6b67a8da4c.pdfIn PDF document text
    • https://semizomemakov.weebly.com/uploads/1/3/0/7/130739936/6345457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_602affb30f039.pdfIn PDF document text
    • https://pefibiwurabamiz.weebly.com/uploads/1/3/0/8/130874510/tisamogemavi_mumejebadozu_solaxerod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499636/normal_5ff9b004170d8.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/2257793b-a974-4db2-83f1-708933386fd4/what_major_events_happened_in_the_year_1600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d80f0fe-0849-4515-a909-284c467ef8bd/89978888224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ab4da6-18cf-4b06-9eb3-c424a3022dba/hp_stream_11.6_inch_pink_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ab68b4-7c37-45f7-ba87-f3dd2a458764/garageband_save_as_mp3_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c1d8a1-e99b-4dc8-a03e-e427317061c1/86991303396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ea7c25-4885-4b5b-8739-1b5e96d84611/pedal_footswitch_fender_mustang_ii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c39419-d826-40be-b54c-29498a5215d8/the_secret_daily_teachings_app_free.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_off0000e167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE167 5200 bytes
SHA-256: c9a8c493ef232771f19e53aa0e6e495bb5dd23084079fe5ce03f01b6890ef096
font_01_sfnt_off0000f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 10792 bytes
SHA-256: 1241d6475cb579dcea9740ae9966c7b0926319fbfb7fbe0cf40cbe36899f2ec2