Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dab4072f4c5d2d3…

MALICIOUS

PDF

43.5 KB Created: 2020-10-07 13:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c9a0097325cf9161940531abb414f4b7 SHA-1: 163eceb37ddc26543a116f1dbb627e8c4c7fb0ba SHA-256: 4dab4072f4c5d2d349142105ca195e77ab13586f64731c5954e4f7de98a2af47
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious or unknown domains, and one is identified as a malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely intended to trick users into visiting malicious sites. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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/strik?keyword=acdc+economics+ultimate+review+packet+pdf In PDF document text
    • http://zewusi.jkeithdonnelly.com/uploads/1/3/1/3/131398140/1693516.pdfIn PDF document text
    • http://files.coalitionpoliticsandeconomicdevelopment.com/uploads/1/3/1/3/131379541/wojolube-juzafebetujake.pdfIn PDF document text
    • http://zokebozu.dorippu.com/uploads/1/3/1/3/131379406/a86c4630f.pdfIn PDF document text
    • http://files.semitourist.com/uploads/1/3/0/7/130739122/61ab2b72.pdfIn PDF document text
    • http://fenebufir.capparellecreative.com/uploads/1/3/1/8/131871609/7018125.pdfIn PDF document text
    • http://tokoxu.daughterofthestarswellness.com/uploads/1/3/1/6/131607062/3d3755.pdfIn PDF document text
    • http://zanoziki.wood-honey.com/uploads/1/3/2/6/132682090/vodujaganosu.pdfIn PDF document text
    • http://lejal.badlyscattered.com/uploads/1/3/1/4/131483281/doxunulo-wukemelorida-vonanuk.pdfIn PDF document text
    • http://files.steveneillsgarage.com/uploads/1/3/0/7/130739778/999577c008d56.pdfIn PDF document text
    • http://files.kathleenlynchart.com/uploads/1/3/2/7/132740930/lopakerabodawebitili.pdfIn PDF document text
    • http://urluss.com/158e73In 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/1/0481/5503/3753/files/philips_universal_remote_cl015_codes_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2922/0504/files/grand_theft_auto_mobile_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1218/4469/files/38811778047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/neshaminy_movie_theater_times.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5001/3350/files/blueberry_upside_down_cake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5221/1099/files/pevixowawezobibegobup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/gugepoxunudipimafijedibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3482/9222/files/whirlpool_quiet_partner_dishwasher_manual.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_off00006055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 5508 bytes
SHA-256: 7eec05a16f6a2d9cad612cca8e33830519cdaedb1139a1a4f1187e3c3d243d08
font_01_sfnt_off00007313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7313 14628 bytes
SHA-256: cf804e6bbc8f6caab5dcd5ee41001000c54e9513f8b009b5663779d401643a86

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