Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2d57c55871e2a9…

MALICIOUS

PDF

80.9 KB Created: 2021-06-08 00:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4ba28999b2838389c6cdd3e29a2f71ae SHA-1: ac5c1d67a24a31ab85e4d9df8f4e8cf2a5541f37 SHA-256: dd2d57c55871e2a9b40fd77f19b0e19ebe978be127d3671dc75c3ca477104ffa
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous external URLs, with a primary suspicious URL being https://jottigo.ru/123?utm_term=areal+av+trekant+formel. The document's structure and the presence of embedded links suggest it is designed to redirect users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=areal+av+trekant+formel PDF link annotation
    • https://nenuxigibasus.weebly.com/uploads/1/3/4/6/134694542/mazedezigepud_xedosaxupix_lozedosikidebu.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/vesaregotez_nojokexomu.pdfIn PDF document text
    • https://sawilemevopano.weebly.com/uploads/1/3/4/5/134577559/6267206.pdfIn PDF document text
    • https://maxamiboxu.weebly.com/uploads/1/3/1/6/131607029/tekofinu-vamoto-mupoju.pdfIn PDF document text
    • https://mokoxobijukox.weebly.com/uploads/1/3/4/3/134321678/fovusizetetonikomabo.pdfIn PDF document text
    • https://lodoxaravejow.weebly.com/uploads/1/3/4/7/134719504/zipezokiru-kigoreduje-tuwekepedipixu-warezugojew.pdfIn PDF document text
    • https://povelelowu.weebly.com/uploads/1/3/4/3/134331265/333160.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/3818890.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/f0654553-0636-477f-8bec-7142f8050fab/how_to_read_a_poem_and_fall_in_love_with_poetry_by_edward_hirsch.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/w/file/fetch/144624864/gokeriragopavidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043f68b4-1a95-49cd-b786-d1de92c602a2/fundamentos_del_diseo_wucius_wong_parte_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f8ecd36-ea0e-4d07-bcdd-d4bc516d44f5/muxinibizopemol.pdfIn PDF document text
    • http://jebusolole.pbworks.com/w/file/fetch/144563706/88261520717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a00d6ab-25a8-47be-8981-724ae4b64cfc/how_to_find_old_picture_on_facebook.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/f/42209852700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f137eea3-ba18-4525-bd9f-1440f000baaa/fitebelikawemixokozij.pdfIn PDF document text
    • http://kigiputilik.pbworks.com/w/file/fetch/144608730/imca_sel_019_guidelines_for_lifting_operations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59a1362-c1b8-4edb-a77a-fe52c24f96b4/woxidap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7882ffb-bbc2-4d47-80f5-2cc8be532d46/54597493119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d02ad03-8224-4400-aec7-aa7ee2a8bfdc/netojoxisi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 4848 bytes
SHA-256: 9623d846dfbab5d14e0f9250d0f04ee15707ad765e3fc609140961998d670e8e
font_01_sfnt_off0000f67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67E 12568 bytes
SHA-256: 4b8f35f572a039942e2e02ef00a113bdab1e20a26a28e3cf741371ae9dc9f38a
font_02_sfnt_off00012041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12041 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c

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