Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43dd969a75e8edc…

MALICIOUS

PDF

71.7 KB Created: 2021-02-22 02:30:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5b3b799d7b3e1c77661671bbbe62fdc4 SHA-1: b10b6eafac82667ae566f2d87a36ba333a69a8f7 SHA-256: b43dd969a75e8edcda18776bdac1d9e46fc953ab96833b5d4055a30cb988ebf4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious URL, and ClamAV detection confirms it is a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to 'puppies for sale', which is a common tactic to trick users into clicking malicious links. The presence of multiple external URLs suggests an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=lab+mix+puppies+for+sale+in+michigan PDF link annotation
    • https://cdn.sqhk.co/vesagivara/HudjChf/zetevavuravirilezim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_6019b9890a80d.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/siel5hb/new_flute_music_tik_tok_ringtone_download_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fabadipub/hMPBjhX/race_the_traffic_moto.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/h21Qfie/falling_action_used_in_literature.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_60109ae61c496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_602caf43994b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_5fe68e9c3ca72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5fd7e9a3e1b50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475580/normal_5ff0e867e66f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_5fd86ba8d55d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/82104961307.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/mubebomovule.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/78420592910.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/97933915079.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_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 5580 bytes
SHA-256: 4338a17c88104ec5326f1bb07ee80aa02610b40d9563a687c256864a54b39bfb
font_01_sfnt_off0000ed97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED97 10644 bytes
SHA-256: c8e8862d55b439b0d055f9bfc16069c6a50b3b292f486860e90a952d304bf274