Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0dcd9cf978969a…

MALICIOUS

PDF

85.3 KB Created: 2021-03-22 07:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0085ce203a38722f71d8cde27ae846a1 SHA-1: a3178fc4523d1d2dd2a10c1d47fbf28eed8b6eb0 SHA-256: cc0dcd9cf978969a575faf6ac8cbbb6cb9b3042a24823aa4baeda940192fd2f6
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the heuristic firing 'PDF_SEO_LINK_FARM' strongly suggest an attempt to manipulate search engine results and lure unsuspecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://druttle.ru/wix?keyword=heart+of+vegas+mod+apk+download PDF link annotation
    • http://ledozikatiresev.scienceontheweb.net/34840936629.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/53475200169.pdfIn PDF document text
    • http://itclick.info/gagatijew2s67c.pdfIn PDF document text
    • http://metinozub.iblogger.org/android_10_oppo_reno_z.pdfIn PDF document text
    • http://save50.pro/can_you_still_buy_revere_ware_pots_and_pansvnn57.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/b5bb15e1-91d4-4b16-ba9c-61f46d4c1382/can_alexa_play_french_radio_stations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1632f4-2f87-43f9-98d2-478561261385/sategosifegogidisigos.pdfIn PDF document text
    • http://kipoluni.rf.gd/tutorial_lightroom_di_laptop.pdfIn PDF document text
    • http://jolatuziguxobe.rf.gd/64667910820.pdfIn PDF document text
    • http://rovizomaguwex.atwebpages.com/bandura_self_efficacy.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_51129c4c729b4a98a6a686a17865f4dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5cc786-9ede-4977-9d26-a4fe0be20b8a/does_punishment_prevent_crime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef35dd7-2fe1-4005-8720-546740ac43bc/yamaha_dtxplorer_electronic_drum_kit_parts.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_3020c277329d433bb0ee66494ce55e43.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e4ce42-bf95-4a15-94cc-c1c02c88113f/20089896419.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_13e07399a61f4429a319f86f3b9d0270.pdf?index=trueIn PDF document text
    • http://sidimusi.rf.gd/javujukojapijemusuzenuk.pdfIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_97fe15688057455f95090b71bb84afaf.pdf?index=trueIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_7df4d5b203f449f08b1fa47db722e129.pdf?index=trueIn PDF document text
    • http://josuxak.atwebpages.com/why_is_my_brother_printer_error_light_flashing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830511d4-7eac-40b1-b785-bd9e5eb05254/yaesu_ft-7800_separation_cable.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_off0000f736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 5540 bytes
SHA-256: 93758d8dc31e2bd1507db6317fbcbfafb7ba4cc332afc9651d50cd8c9a8aa308
font_01_sfnt_off00010a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A16 11972 bytes
SHA-256: 6e9b31e9c43e5d0480a48ac36d4d3001197d1a60c11d77b7201d20d5632d7d14
font_02_sfnt_off00013325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13325 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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