Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e309146cb27596…

MALICIOUS

PDF

42.7 KB Created: 2020-10-11 12:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b39038c0949e94b0893a0c13b1284d13 SHA-1: b04093f691b5ef70752804e60ea9883ea5e1e9b9 SHA-256: 33e309146cb275960f8d40ad6dbc8c02f65bcdd67ea701c8639cbb6f4ee30667
94 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest a potential phishing lure, possibly disguised as a document related to a 'Fluke 115 multimeter for sale'. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/pify?keyword=fluke+115+multimeter+for+sale In PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/59676532307.pdfIn PDF document text
    • https://site-1038304.mozfiles.com/files/1038304/rixora.pdfIn PDF document text
    • https://site-1040263.mozfiles.com/files/1040263/kijekawaxufupazutowet.pdfIn PDF document text
    • http://files.createfairtrade.com/uploads/1/3/0/8/130874031/3625116.pdfIn PDF document text
    • http://files.manualhandlingresource.org/uploads/1/3/1/3/131383790/4942818.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9259/4854/files/simulisovabutumozeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5147/7913/files/worst_cooks_in_america_winner_ari_robinson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4369/1413/files/sakamuvodetakewoxonimuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5833/0786/files/pbs_sick_around_the_world_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b7799b-dcea-40cf-a3f6-728d83e73c31/48326391941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3830930-378b-45ea-b7db-4726b9f7e9f8/87404861395.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_off00006ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB1 5108 bytes
SHA-256: 7d8ce3423f59b3f72d12d215b4e941fc6d111114892e2d6dc874c29f215c3bda
font_01_sfnt_off00007c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C02 10108 bytes
SHA-256: 65516c358367aa58f7dfb5f369a9967e06a0ba82a93470b67496934bef997a5c