Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eeb9f08555b6f08…

MALICIOUS

PDF

111.8 KB Created: 2021-04-25 08:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 761de1385db0a7ab79010e15d1bfae28 SHA-1: 89079c41954c5c06756a24b101c9b90d15b925de SHA-256: 5eeb9f08555b6f08248131c19301be1cfd6a8742b465cccc85b7e5176b7d81ba
206 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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://crophysi.ru/strik?utm_term=timex+ironman+triathlon+instructions+set+time PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403541/normal_603f1ef8e14ad.pdfIn PDF document text
    • https://gikapatom.weebly.com/uploads/1/3/4/0/134042778/weronapal-ranepep.pdfIn PDF document text
    • https://belavapapase.weebly.com/uploads/1/3/4/4/134444277/5893931.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/detufamiwarututuv.pdfIn PDF document text
    • https://vasuwogi.weebly.com/uploads/1/3/4/0/134017955/jamaxur.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/42114961445.pdfIn PDF document text
    • http://idealsit.space/glenn_x_sistine2qjqa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409103/normal_5feed089a2a6b.pdfIn PDF document text
    • http://obmenkalnr.online/4884805937053bn.pdfIn PDF document text
    • http://xsafak.com/stranger_in_a_strange_land_songa8n91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5fd111e6e57fc.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/55124141773.pdfIn PDF document text
    • http://glasshookahcatering.com/12895068414l9ly4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_60446c5c97023.pdfIn PDF document text
    • http://shoes-storie.club/jadotelamuwukezaffxrtb.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/kufex.pdfIn PDF document text
    • https://korenumotijele.weebly.com/uploads/1/3/4/6/134687452/9070346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493221/normal_5ffa08cd30185.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/b69745ab-8291-4f1a-85cd-ddceef3874ca/como_preparar_un_bosquejo_para_una_predicacion.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_654f2350ebd44d5d806fb76007de1fd1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34a6a10-5ea9-4c47-b849-9277c6a204b1/epson_xp_620_ink.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/modinij.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_fb96050eb46840b7b4a9002b9abcf267.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad44ef85-8524-4eec-9f45-1776e1c39439/obdlink_mx_wont_connect.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/dictionnaire_franais.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_off00017408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17408 5056 bytes
SHA-256: df8fa0301912829199b3fe2da90f637d5abecf811f692ec963f36c71ebea18c4
font_01_sfnt_off0001850b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1850B 14424 bytes
SHA-256: 0ee5fb7e8342c9d86d19b637163bb18bc8156dc64d183bfa1f4cc1d973687f4b