Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e767e8d0466901…

MALICIOUS

PDF

84.5 KB Created: 2021-03-18 10:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0e35b3015219ed8be1c9ccb778a1d136 SHA-1: f27b72ed5dbb0fff2d2ae4e98eb934764d0d3af6 SHA-256: c7e767e8d0466901ec668eaaed756d89654c50239478193d8c7cc9a2f299b361
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to disposable domains or link farms, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ML classifier strongly indicated maliciousness, and the embedded URLs are consistent with SEO spam or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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://gimoguvi.ru/strik?utm_term=the+beginners+keto+cookbook PDF link annotation
    • https://cdn.sqhk.co/sirepajaku/WggeJBH/gafebebepejonaxibifatuxa.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/endangered_species_in_nigeria.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/UT82heh/duvizinopunobopu.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/legetuj.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzivogawa/icyfN7O/speedometer_tracker_location.pdfIn PDF document text
    • https://cdn.sqhk.co/badimoweba/hdhdid0/procreate_calligraphy_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/mm8ENhc/ice_cream_flavor_vanilla_bean.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b53d7c82-4cfa-4b5b-9e86-1835a7aa5b87/46550562452.pdfIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_7c47015d76b94b2abb99f82ca3dfb7be.pdf?index=trueIn PDF document text
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_29d421af9ef54335a097acc857aafca3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7163052a-68cb-4773-8d52-dc1d65fc00dd/danexajevutexugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32deb1d-f08b-4de2-989b-acb7cd1faf74/dasulubalosoxa.pdfIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_8c279a18b49745629c07089707a0a53d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1cd16f1-ddb7-47ea-92e8-d9b25b561d10/cannot_find_realtek_hd_audio_manager_windows_10.pdfIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_198ff2abd5ae489d8e17ef543aa15f28.pdf?index=trueIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_ed577e9c9e2c4a3281d3f404bd7e9f93.pdf?index=trueIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_c6f2e6577659442497b0c29ca4c50dd1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3ed106-1b54-4644-aacf-e699bb68d88b/trane_xr90_pressure_switch_error.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_52096cabd4cb44d3a92bd1126c577ace.pdf?index=trueIn PDF document text
    • https://b27aca93-056c-4dd2-83a6-fd909c9f709d.filesusr.com/ugd/2ba3ac_ffcaff847632465ebc20360697ffae22.pdf?index=trueIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_b838a6cd39144937a5c6db9e5828d3f0.pdf?index=trueIn PDF document text
    • https://965bd944-310b-4209-a71a-d16e45aaced4.filesusr.com/ugd/5f02e6_c20eb5269ae44e6d8124c7f9419a416d.pdf?index=trueIn PDF document text
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_fddcd0f306324bf5875697ca4b95bfaa.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 4760 bytes
SHA-256: 6e801d9fdbf3fc23b34820526c33fb7d18fac8e5aec1eb2295d6709d2137476d
font_01_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 11004 bytes
SHA-256: f087320320d4de385938a5962fbe25f0020006a700088d5a55601c6c7fd7045f
font_02_sfnt_off0001351a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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