Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ca527b44762c55…

MALICIOUS

PDF

77.2 KB Created: 2021-04-07 11:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a8b3e8fb4fda81599c141d0d7be53352 SHA-1: 88d5b32aba345b8eed8fdcb597503dea399048db SHA-256: 46ca527b44762c55615a11085b0a8fdabeeca59f6536ab7d6224af10c04cbe92
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to a malicious site. Although no scripts were extracted, the presence of numerous external links and the link farm heuristic suggest the document's primary purpose is to direct the user to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.NoRobot072147-9875408-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.NoRobot072147-9875408-0
  • 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 http://shoop-fo.ru/ladiruvalu13kj3.pdf In PDF document text
    • https://cdn.sqhk.co/pugirunosamo/epmhcTz/pofaselomineb.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/ao0W604/kelesumeviw.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/8hhjjjj/refifedalax.pdfIn PDF document text
    • http://tublitalia.space/lilasald3mg.pdfIn PDF document text
    • http://santaparker.store/wd_my_passport_wireless_pro_not_mounting03gdp.pdfIn PDF document text
    • http://barbanapoli.moscow/coin_pusher_game_onlinek39rd.pdfIn PDF document text
    • https://cdn.sqhk.co/dotifonuvuwi/fR3hahf/10207186056.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/fjaOGsd/gadurigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/0IJhScypsXo/wb?keyword=does%20panda%20express%20have%20fried%20shrimpPDF link annotation
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_85fada8f21bb49d68740c25668e3a6d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc020f4e-46f0-42b0-a979-2b6c90e7b3a1/bibakipiden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce681931-6e7f-4d40-8478-882eea213f76/wafefakarasidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e73f471-de77-41b6-84de-03ef9cc719a3/miwapi.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_b8aa3dc0525d4c338b4613b1c3783d44.pdf?index=trueIn PDF document text
    • https://c751e6e8-0850-424d-b14e-d7ae46260796.filesusr.com/ugd/bc1028_f544af715506484e83e7ea80b14edb17.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb3d0e9-79bd-4158-9916-d176c1eab0b7/87236903741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bedbaef2-4ec4-4b3e-a995-3a3cdc3edafc/hayward_power_flo_matrix_1.5_hp.pdfIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_cb86560e7d3349d3b5ae46a8fafbecb6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38b8450-9d95-4dd2-a77d-26107af5084a/roland_fa_06_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229ad7b6-265f-43ba-81f4-a5c91884ca65/padefujepepa.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_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 5376 bytes
SHA-256: 094e6a007472b12552792f42f412e795aef9f1164f62477c91240e769eea3b14
font_01_sfnt_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 11360 bytes
SHA-256: 2716b141f64830bdfde20e408b6a04c83770e4b4f284e6230817bb434f5a0be3

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