Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be9a723128692a5…

MALICIOUS

PDF

44.0 KB Created: 2020-10-10 00:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: da2eeb0feb0c1437c143080f24ba2bc8 SHA-1: e4d2d2f3d766fac811f45910fadbb614aafeb536 SHA-256: 3be9a723128692a5fc97207f5afd52fc5f2e55fe8e9fba5fff958b56020230ba
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=veskys+camera+manual In PDF document text
    • https://site-1043258.mozfiles.com/files/1043258/suzefogiv.pdfIn PDF document text
    • https://site-1042453.mozfiles.com/files/1042453/vuzijomudagopabasivimugu.pdfIn PDF document text
    • https://site-1048482.mozfiles.com/files/1048482/72475170143.pdfIn PDF document text
    • https://site-1048206.mozfiles.com/files/1048206/45386024509.pdfIn PDF document text
    • http://gezeki.speedlabtraining.com/uploads/1/3/1/8/131871781/nopesavonaxurab-zofimafusa-sorawegadiwaru-kobatoxas.pdfIn PDF document text
    • http://files.gncpw.com/uploads/1/3/0/8/130874361/jepogigirevurixanepa.pdfIn PDF document text
    • http://files.truthchristianacademy.info/uploads/1/3/1/0/131070258/kufusefejexis_fejasejeloxup_joduwo_wubegoxexux.pdfIn PDF document text
    • http://files.kelleygrantbooks.com/uploads/1/3/2/8/132815008/fefesozef-vekulupexejifob-gegir-paziwer.pdfIn PDF document text
    • http://files.azadlab.ca/uploads/1/3/1/4/131437878/setikuse-tujadewegunome-divameta.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/743604e6-ceac-4302-bb75-0086e5a30707/568953785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f5c3c9-d77e-4da9-b104-443c7de50d0c/dabopagix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4a3348-2ec3-45c4-84dc-3322d8f16179/vazipugabutidojope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5460/7777/files/zalewugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0202/5368/files/fadon.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_off000065c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C6 5076 bytes
SHA-256: 158ccc415e7983c7ffeb73dd89a5796df5534fa0e933c75adb13fa991d44777f
font_01_sfnt_off00007702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7702 14088 bytes
SHA-256: 2acbb3ec7579cfaea858f73bb7c0f7fd79da2727766b08bbe7ee1a8b330bbbad