Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ab4cd004fd8d70…

MALICIOUS

PDF

81.0 KB Created: 2021-05-24 14:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d7311f907406951ff9233207c64f1dfe SHA-1: 114b5f06839a90d0500ee816a6e7f180da5f1f44 SHA-256: a3ab4cd004fd8d70b58ef35339557cfc7991169b863323701179a70fe6b91d72
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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-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.
  • 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://fokemale.ru/strik?utm_term=cute+mixed+dog+breeds+that+don%2527t+shed PDF link annotation
    • https://magirakikepemun.weebly.com/uploads/1/3/4/0/134000039/9807382e.pdfIn PDF document text
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/8230f838a46.pdfIn PDF document text
    • https://xozavefo.weebly.com/uploads/1/3/4/0/134018900/wexujabafi.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/basebefoji_wifetefapidukas_lubapalurukib_kupixigoza.pdfIn PDF document text
    • https://sorefumegevori.weebly.com/uploads/1/3/1/8/131871670/gajidegu.pdfIn PDF document text
    • https://nitetemefugek.weebly.com/uploads/1/3/4/7/134772401/ba1719.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/ee80c477-1af2-43c2-90ad-a34c22b769cf/how_to_put_a_casio_fx-9750gii_calculator_in_degree_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/34881536854.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/hranin_porucha_osobnosti_a_jej_lba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1196e4a0-0ff5-4921-9e4b-252f9d5841fe/how_to_buy_water_flosser.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/75109526395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d497b0e-a880-4136-9bf0-a94d513b77bd/toyota_camry_2019_se_price.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/urbanisasi_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6647bdac-f69d-455c-9538-715e1b0b7881/the_lord_of_the_rings_all_cast_then_and_now__2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/irregular_verbs_perfect_english_grammar.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/cisco_ccna_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/50027977262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8283c483-98f7-4fe9-b9cc-ebf0adc365ba/59509223497.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_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 5352 bytes
SHA-256: 6a8472edea407f4cb32e6cd4910c2b5a6eb5fe9f9ca48a28472d9a9d6ab91c94
font_01_sfnt_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 10044 bytes
SHA-256: 17144516d0df2dcbd62d3a433758f2f47f7a5bfaf3f592207e49d7d3384c46a5
font_02_sfnt_off00012141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12141 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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