Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89c17fc394d5bc6…

MALICIOUS

PDF

69.2 KB Created: 2021-04-03 04:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a22af15eda0a46d0529955669d163d17 SHA-1: c4aa8c918741f360996786874e3363bc7fd46cd3 SHA-256: f89c17fc394d5bc6b45e7c3a5345cf5e5d5e3ac26e0e910e02d894c1a5ce4aaf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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://jumiwimov.ru/wix?keyword=simple+subject+predicate+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5fe87a9af1a0a.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/lusenevupomakumonodu.pdfIn PDF document text
    • http://dezowem.medianewsonline.com/1562178574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_600e08221175e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_600dc268bf0d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_601e6e9f3abe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_6045ea4f381ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485930/normal_5fcc1e927168e.pdfIn PDF document text
    • http://davegopodowog.iblogger.org/67578439241.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/asterisk_pbx_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_60312562a6258.pdfIn PDF document text
    • http://viwuvomax.iblogger.org/rafasajiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_60349eb67e415.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wopawer.rf.gd/busagufoxexekij.pdfIn PDF document text
    • http://godikopikigelug.epizy.com/yoga_for_beginners_weight_loss.pdfIn PDF document text
    • http://butojidinogulab.rf.gd/weloduzasaguzelirotafi.pdfIn PDF document text
    • http://rufazigivemebod.rf.gd/muxilogalubeduwesisuj.pdfIn PDF document text
    • http://nisuzadusidu.epizy.com/internet_explorer_font_setting.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/85814567868.pdfIn PDF document text
    • http://vivimaga.epizy.com/numisoxetasuropagavirago.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_off0000cfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAF 5788 bytes
SHA-256: 053e71e017ebc5182cc401bc18c326c9bda12e44cdc009bd7ad8515169f1356a
font_01_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 10732 bytes
SHA-256: 99ba971e1b6b8a8df882eb86998b166b58d588a44a27f8c683138b2a1408a0f3

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