Malicious PDF — malware analysis report

Static analysis result for SHA-256 daef7c4454d2b0e6…

MALICIOUS

PDF

77.8 KB Created: 2021-02-20 07:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 35b02fb2e2775c89b67fea7b3e3a3885 SHA-1: b13473d88f1d325118362189fc6ea96a9259839e SHA-256: daef7c4454d2b0e6397bbdd4aacabc676df50c34bf2ade840accb3434781c4da
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, suggesting it functions as a link farm. The presence of URLs like 'bologen.ru' and 'cdn.sqhk.co' points towards a phishing or SEO manipulation scheme. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=dream+yuga+bike+price+in+nashik PDF link annotation
    • https://cdn.sqhk.co/wufevinek/hiijmzu/roku_tv_no_sound_when_streaming.pdfIn PDF document text
    • http://nowatora.22web.org/winrar_for_android_4._2._2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414357/normal_5fdd313b06f57.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/LOjcgjC/xumevavegejemekojete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5fdb55d72176c.pdfIn PDF document text
    • http://agentsoft.space/best_utv_side_by_side_2020d8uzh.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/j1YHUJV/jewipixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_60149130db9c8.pdfIn PDF document text
    • http://najapizarut.22web.org/guideline_h_pylori_treatment.pdfIn PDF document text
    • http://hhizmet.com/wilcom_embroidery_software__crackg862y.pdfIn PDF document text
    • https://cdn.sqhk.co/vanatuwo/uhdidpk/xozidupemiragezofipote.pdfIn PDF document text
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/jobegogagew.pdfIn PDF document text
    • http://wtia.space/90s_kids_movies_on_netflix_2020d5jd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5fca0ce2f0dec.pdfIn PDF document text
    • https://nizitorewazoxi.weebly.com/uploads/1/3/4/7/134704220/9291090.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/Pkphfgc/wallpaper_tumblr_cute_for_iphone_black.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
    • 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_off0000e44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44A 5312 bytes
SHA-256: fc2629953ad143b1a0c3d2a824746c2336ea2a2f25e5a3a5cf6e138cb044ff04
font_01_sfnt_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 10980 bytes
SHA-256: beb87819c554790c9707c3744bdfc978b1841cc8fb384974f0791d4e9dabf9cd
font_02_sfnt_off00011baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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