Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01d13c348d6f040…

MALICIOUS

PDF

78.4 KB Created: 2021-03-28 08:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 322e0589f4695d798067f031f352ad57 SHA-1: 525a63e1ca14415c6de9548944be953b83f0074f SHA-256: d01d13c348d6f040bc3aa2de6cdbca37e6524f84bf7ba5c6a5e140523d78a79d
186 Risk Score

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 6

  • 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.
  • 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.
  • 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://xezojetit.ru/strik?utm_term=dirt+bikes+for+sale+second+hand PDF link annotation
    • https://dujemezore.weebly.com/uploads/1/3/1/3/131381607/68a0388b18.pdfIn PDF document text
    • http://xonesasa.iblogger.org/summersville_lake_fishing_report.pdfIn PDF document text
    • https://tarutugiwom.weebly.com/uploads/1/3/5/3/135326066/7ec0f0.pdfIn PDF document text
    • http://xinupavob.iblogger.org/border_collie_terrier_mix_information.pdfIn PDF document text
    • https://levalezekavazif.weebly.com/uploads/1/3/4/6/134639406/8c4703c48633d.pdfIn PDF document text
    • https://paxolobiwoke.weebly.com/uploads/1/3/1/1/131163878/lopulutikut.pdfIn PDF document text
    • https://xizafezepogoja.weebly.com/uploads/1/3/4/4/134446531/bugumikaf_fevewu_xupozijobonil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_a45f5f09034945ebae437e92ef062644.pdf?index=trueIn PDF document text
    • https://cc603790-e41b-456e-9848-d053b607cad6.filesusr.com/ugd/389793_058783f8e8c242469a1ec3c24edc39e6.pdf?index=trueIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_9b80c9733cea40fb87a4224e8dfe9ef5.pdf?index=trueIn PDF document text
    • http://sidukumu.epizy.com/teori_manusia_sebagai_makhluk_sosial.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_faef7883d4e24531a1e0f1c565bcc65a.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_8b559c29d7904409b9c167ca8ec77ba7.pdf?index=trueIn PDF document text
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_512bc1fcd3224501b4ef1d50fe622f47.pdf?index=trueIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_4d3e200e8296499b9081ec41c6f71e63.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_7bb8ebb964c04124b2322854608e2a92.pdf?index=trueIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_0b95cfb1102c42bfa30ba605127534a2.pdf?index=trueIn PDF document text
    • http://bapomel.epizy.com/mogid.pdfIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_3ccb70f01d3d48a0b5f010aa3d674927.pdf?index=trueIn PDF document text
    • http://lafeseg.rf.gd/bobutaze.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_off0000f598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 5312 bytes
SHA-256: cfeb731c3fd0aae6443a68ba574946217acf376d7c5c40729cd4f58c53408fc3
font_01_sfnt_off000107a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 10732 bytes
SHA-256: 089b2718609408ebc770af56d074ccb8cfab0efded6d58daef36228c49306530