Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9273891bdd2862…

MALICIOUS

PDF

76.5 KB Created: 2021-02-19 15:24:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 013b6b5f1785e3a64220ded26715ae1b SHA-1: 31952729b07b2967f5a34649cdfb72fc0ce59f93 SHA-256: cd9273891bdd28625fa1cf569ccfec39423f92e2c1acac1e87c3f45912c4c19a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains a search query related to 'The exorcist hulu season 3', which is likely a lure to encourage users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/strik?utm_term=the+exorcist+hulu+season+3 PDF link annotation
    • https://cdn.sqhk.co/xusopusavo/fjbhhje/assistant_shortcuts_app.pdfIn PDF document text
    • http://samotimijo.22web.org/kapoxugabikep.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/6010128.pdfIn PDF document text
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/papemugole.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/fLfhchi/39345126177.pdfIn PDF document text
    • http://dujalubudekir.22web.org/news_broadcast_script_for_students.pdfIn PDF document text
    • https://cdn.sqhk.co/lipisowonili/4ihfUgj/fufesulagefu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379601/normal_5fdcc2be43644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456996/normal_6023e2a153ebf.pdfIn PDF document text
    • https://cdn.sqhk.co/sikudile/jjhp4dh/buzupopezigiki.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/zaporawepof_zezaluzibude_bomugavemakife_kiraladoxavetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463551/normal_600d6ab3aa91a.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/4gfFgjf/retrowave_background_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/gMFhhhj/stick_z_archer_mod_apk_download.pdfIn PDF document text
    • https://regegabup.weebly.com/uploads/1/3/4/0/134040411/pepekaxedisiva-modurulage-xisowe-jofuxaxeg.pdfIn PDF document text
    • http://pejurazatox.iblogger.org/hp_pavilion_dv7_disassembly_youtube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xesesezaxemu.epizy.com/child_birth_delivery_video_free_hd.pdfIn PDF document text
    • http://lejopuluke.rf.gd/zozetaw.pdfIn PDF document text
    • http://lakasixes.rf.gd/21537359047.pdfIn PDF document text
    • http://jowofosepenomun.rf.gd/58211930889.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_off0000edcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCF 5068 bytes
SHA-256: 5ea59804f8a4d9d76ef1be6f500a8678208ca143c291e9502c15309fc9a0b02e
font_01_sfnt_off0000ff0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0C 11120 bytes
SHA-256: a99791b5bdbff135d2e7b7dba874f63fb7f58246deeec6790b2b10d94a4e83d9

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