Malicious PDF — malware analysis report

Static analysis result for SHA-256 5adab41755907007…

MALICIOUS

PDF

74.7 KB Created: 2020-12-26 18:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9f43241bc09d06a60cf2e76eeedee951 SHA-1: 719880124d06f638f297d18df67733a7a64e6ed7 SHA-256: 5adab41755907007f7317931fc2745d59d5eca7b7349e27ea684af0f4e8e8221
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'CLAMAV_DETECTION' heuristics. The document body, though heavily garbled, suggests a lure related to 'Robo avenger mod apk android 1', directing users to the 'traffset.ru' domain. This indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=robo+avenger+mod+apk+android+1 PDF link annotation
    • https://cdn.sqhk.co/gujadozede/Gtmxigc/ruxubinitepuwagekitobaf.pdfIn PDF document text
    • https://cdn.sqhk.co/vekudaselux/q1jjgjT/cool_video_game_iphone_wallpapers.pdfIn PDF document text
    • https://rinumobepora.weebly.com/uploads/1/3/4/3/134377952/vamodevisomaxakexoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409998/normal_5f94e2c4cb0ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f99c26b86e85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5fc607a9bd97a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5fc130439181a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5fde9d489e196.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5be5c88a-c5fc-4b45-a867-cc00cc609b69/24043114250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c05b0afc-0fdf-4ca2-a2cb-805929ac7d9e/23915428799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12639293-d0d5-41b9-8b20-501f68e4a7b5/mubuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13842b9f-1f02-49ca-9b13-faab53216100/describing_a_picture_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7b635f-113a-4e40-8cad-ae7c66e17131/wemidipijerowilezirutija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e08bd34-9212-4ccf-bb9c-ff2e3f8f7612/nesapilelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ba7c68-6b07-4c3c-8b0e-c883e8236f06/ditoji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FB 5100 bytes
SHA-256: fb76f4322655372930ad466550858c0d4c78d3053ffa591e0fb909d4f667a533
font_01_sfnt_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 14708 bytes
SHA-256: f7572f07374edf5c355cd4730421deac4dba2d51944454c550974a8f0ed431e9
font_02_sfnt_off00010fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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