Malicious PDF — malware analysis report

Static analysis result for SHA-256 357272e1c72b2930…

MALICIOUS

PDF

62.1 KB Created: 2021-02-14 09:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 33c0768c2017afde320da0849ba162e0 SHA-1: b3f7405c8efd9d0dafb087307873a1980d650683 SHA-256: 357272e1c72b2930c9638798138cbd648067ad01cead858e3da13d527bc99c51
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and hosting services, indicative of a link farm or SEO manipulation scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are sufficient to infer a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=baby+alive+my+baby+all+gone+doll PDF link annotation
    • https://cdn.sqhk.co/jawafurovif/hhAicqh/63991147559.pdfIn PDF document text
    • https://tetoxoji.weebly.com/uploads/1/3/0/9/130969306/sunuzamiluwi-nibowogan.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/tuxuletotupa-xugib.pdfIn PDF document text
    • https://cdn.sqhk.co/pefibovip/dmsiazl/lakujefitib.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/fPVmhis/zebububunuj.pdfIn PDF document text
    • https://susominen.weebly.com/uploads/1/3/4/7/134714937/5154152.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/word_games_for_adults_appsnnwci.pdfIn PDF document text
    • https://vixekilawuta.weebly.com/uploads/1/3/4/3/134305586/911891.pdfIn PDF document text
    • http://agencymedia-ig.com/93100138608eseej.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/Rmggfji/north_texas_umc_jobs.pdfIn PDF document text
    • http://pekebokunanes.22web.org/android_background_color_xml_code.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/Gpjjhfm/ruwudetusutorapev.pdfIn PDF document text
    • https://zibitevurus.weebly.com/uploads/1/3/0/7/130776177/2688471.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/business_cutover_plan_template.pdfIn PDF document text
    • http://bidasumibave.epizy.com/14595888965.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/frame_size_guide_cube.pdfIn PDF document text
    • http://mafofeguf.epizy.com/lagu_salah_apa_aku_via_vallen.pdfIn PDF document text
    • http://xakafoboveje.rf.gd/bonafide_certificate_format_for_primary_school.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_off0000b4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E7 5224 bytes
SHA-256: 98f7bd0be9e386af8b88a9f0aaf3362f99a773e37a4614cfbe4215d28cd33659
font_01_sfnt_off0000c6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6AC 10244 bytes
SHA-256: f231a04c521f8fbed8cf12ce7fed0bc0e705ca6c4a63f035e3316672263ccb88

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