Malicious PDF — malware analysis report

Static analysis result for SHA-256 806ce1400e534041…

MALICIOUS

PDF

75.3 KB Created: 2021-03-13 20:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: eaa8547afee2ff3239d62f7af32c138d SHA-1: b79075bb9865a0b6168673ed0d86edc84d73cc25 SHA-256: 806ce1400e534041447548c970ed63016390ffe00aeee2a602edffe1bda8998a
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 large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs is 'https://nipisod.ru/strik?utm_term=how+to+use+airtel+4g+hotspot+zte', which may be used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=how+to+use+airtel+4g+hotspot+zte PDF link annotation
    • http://pofaduxiruk.getenjoyment.net/bhadra_lakshmi_stotram_lyrics_in_telugu.pdfIn PDF document text
    • https://pilinuxuxip.weebly.com/uploads/1/3/2/8/132814996/nadifa.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/zomigakadapawese.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/12c9ba.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/wamarilopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_600e34ddd8972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_5fd908736f2cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374715/normal_5fe482999f5b8.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/the_hunchback_of_notre_dame_disney_character_list.pdfIn PDF document text
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/dosajimoxap-nakon.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/0c6dae04-7a9e-4bf6-b3e2-dcefd18d01cd/pofojujapasuzodiv.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/nccn_guidelines_2017_thyroid_cancer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac52b22-4d78-4a4e-9538-0df0977ca8fb/dofofudid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa75108-94a3-4002-94d7-f610ca4f0283/mechanical_engineering_jobs_in_pune_chakan.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/bncc_ensino_fundamental_mec.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0758a8-9b3f-480e-8ce4-e99c50dcbc51/82123888267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32066d98-2cce-43c5-9d22-b704035d577d/fefokiwetosapunezux.pdfIn PDF document text
    • http://zotubune.myartsonline.com/20829382436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4b7b0f-7885-4580-9808-5a183bb36369/26342980574.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/centos_6._4_desktop_iso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51f7548-c1f8-46b8-911d-3dd21736b955/vurozajikuxedikadabolugi.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/avicii_tough_love_ringtone.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_off0000e84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 5272 bytes
SHA-256: 52cb3c4fd4412e3c1edcecdc40c7cf2b66e6554041c3732c69872a53d9445514
font_01_sfnt_off0000fa55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA55 10900 bytes
SHA-256: e9e225f2a2c51958564f3b8bbcea5089c71c63f5d501cc62ae867c44cfb197e4