Malicious PDF — malware analysis report

Static analysis result for SHA-256 922e0226672490e4…

MALICIOUS

PDF

73.1 KB Created: 2021-06-04 20:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cb0eaf19e45b4b5392cccc58fd90f88d SHA-1: fed4a8cc87bcc6302e8b75037d528906b2d686ef SHA-256: 922e0226672490e4a4c12dff6e5fa6e87d901a8be43162a0451c30a7353cc554
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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/pbw?utm_term=airplane+real+flight+simulator+2020+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379471/normal_604f841d8da40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5fe7a0b4a8367.pdfIn PDF document text
    • https://bomigisojibovo.weebly.com/uploads/1/3/0/9/130969974/b222dc9d6709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5fd8f1852bf54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5ff105c42bbae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463005/normal_5fe3c118d0714.pdfIn PDF document text
    • https://gekirexuwiri.weebly.com/uploads/1/3/1/4/131452917/2701225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_603b9185568ac.pdfIn PDF document text
    • https://nonedavoxezi.weebly.com/uploads/1/3/5/9/135956696/6946719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_6032a62be2f21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464532/normal_5fd699377185a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_6046f52f788ce.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/fogebovowiwidiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_601dbb77ba664.pdfIn PDF document text
    • https://surejijal.weebly.com/uploads/1/3/4/5/134525532/nejumufileza-migisopirufixe.pdfIn PDF document text
    • https://wagetuve.weebly.com/uploads/1/3/5/3/135323282/2036285.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423188/normal_5fc94fe303349.pdfIn PDF document text
    • https://sofakixejiz.weebly.com/uploads/1/3/4/2/134265497/44ec3f69bd1.pdfIn PDF document text
    • https://nezumise.weebly.com/uploads/1/3/4/2/134265586/semofepa-votaj-gipipixanasuf-goduf.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/626ab087-212a-478c-a285-4b665bbc6768/cheat_codes_for_minecraft_dungeons_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a983f8c1-aed4-47b7-8933-6e8cc918dc01/fibofizelubokodufibijej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43061220-82da-49be-aa95-0d9e7a7b3b23/pofope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757b7b5f-f6c3-4de6-ad7f-b47b151658cc/39697431448.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_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 5780 bytes
SHA-256: 0efe189cd7f6661c7b4b2ff058dda66671a8c056fb8079bfaa5cb18b27ce956c
font_01_sfnt_off0000f27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 10572 bytes
SHA-256: 0848f11fcf26812612cf1634626a871bc02c85ecd34ddb6d043a246b3de83d6f