Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5ac77f97ccfa43…

MALICIOUS

PDF

71.0 KB Created: 2021-06-02 05:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8ec19579c8db5481d5853eef990cabb5 SHA-1: 20aee3ba46846ef7eeef1fac260544e4a1836f66 SHA-256: fb5ac77f97ccfa4380de7af97fe2cc45ba6dbeb9974a6b0588271f517720794b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://medvor.ru/pbw?utm_term=gramatica+de+uso+del+espanol+b1+b2+pdf+download PDF link annotation
    • https://purolitawi.weebly.com/uploads/1/3/4/8/134894903/da3592cd7e3f.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/tolug.pdfIn PDF document text
    • https://fosakozetabu.weebly.com/uploads/1/3/1/4/131483491/zazen-fulokimifikam-nubunavi.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/75f36977-fd51-4b70-be89-1b3bccac0f84/simple_sandbox_2_mod_apk_unlock_all.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bcc8b84-48a7-444b-af3c-3220263ca2b7/nuzexuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a63dcab-e11c-4022-bde1-1e15a07eee0d/vatodut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4d2b4e-b39b-4593-ad88-befd411b1b85/xejolupifiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b578cd9-146b-4893-877d-2b78243c0eca/nojexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4dc47d-2833-4803-b52c-ac1e8506cbf8/54510062901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0001f0c3-e0e7-48a5-b526-bd08be010fb2/5080107449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94619d8-f178-4ea0-b9a3-5fafbcaa8717/free_netflix_gift_card_codes_2021_april.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a817fac-8402-4a9a-b2d0-411b65b4cec6/capoluoghi_di_provincia_dellemilia_romagna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/050a739e-6d00-41f3-aeea-59674f8ee40c/29278214765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3622299e-bd38-474a-bddc-3262ef410e06/ketasurug.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/how_to_get_unlimited_likes_in_tiktok.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/f/depubuvijiweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce4bf37-4036-4d3a-83db-a21bb98127f6/dopomowoxidagaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e845349-6a71-4cfa-8077-cacdf5de2780/podifamoxazefafimefino.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_off0000ca9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9C 3304 bytes
SHA-256: 4bbb9a63a2b91d605674a5d8c80fa38cf4c7b707ab56eb8b824751d1cc58dddc
font_01_sfnt_off0000d663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD663 5748 bytes
SHA-256: f1f1e845e0d9fce33157b6fdfecfcce4103de990ab262cbf23fdbf701bb6b975
font_02_sfnt_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 10920 bytes
SHA-256: 71a1b8a17d3f3053d2d2a898623e480fef8805b3d9e74dccf38f5c4047a74f92

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