Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e81d62280cce4e3…

MALICIOUS

PDF

71.9 KB Created: 2021-03-18 16:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 33ca2268ed618cfbc8a25307203edf3b SHA-1: 52ed2b42ac9bb51ead9d62ecad15579fd2cfd4b8 SHA-256: 0e81d62280cce4e3dc79f41d7b9d351e08fff418c5a973a1584e8c866a58bce6
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The ML classifier also strongly indicated maliciousness. The document's structure and embedded URLs suggest it is designed to redirect users to potentially harmful sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links points to a watering hole or phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=mor-flo+water+heater+specs In PDF document text
    • http://esclick.pro/divopubuwasavotewubikuvse.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/webeb.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/fenoteverugezanawege.pdfIn PDF document text
    • https://levarimabogi.weebly.com/uploads/1/3/5/3/135328943/cf368.pdfIn PDF document text
    • http://promoocaoameericanas.com/mexuzamopofetuz71fsi.pdfIn PDF document text
    • http://1xbet-registrat.site/exercice_de_calcul_de_dose_infirmier_avec_corrig10lqk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_60502e5c1c9ce.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/gexitup_nuwokedopin_sowojadetat.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/solid_principles_uncle_bob.pdfIn PDF document text
    • https://kupajozowujuz.weebly.com/uploads/1/3/4/8/134881722/pupewibadelaze_sepoz_lovokusakigeku.pdfIn PDF document text
    • https://xobojurum.weebly.com/uploads/1/3/4/5/134599739/madoweketexowi_zazaw.pdfIn PDF document text
    • https://dedemapisiwopiv.weebly.com/uploads/1/3/0/7/130775251/2516374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_604c9ca319438.pdfIn PDF document text
    • https://gipazekafasulal.weebly.com/uploads/1/3/4/6/134600210/mitufa_xewamugibadowob_vilibumibu.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/palikuvexake/filoronesogik.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/4604395476.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/31217261605.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/lewevulete.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/65843254915.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_off0000dc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7C 5232 bytes
SHA-256: 3a5d2917847810a32bf52c61a4874c5f5621173f826139b086903883cee9b9ca
font_01_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 10716 bytes
SHA-256: 56e8433a8504670832ca935b3ace011779ad32c900430869aec8eefc74ff5fba

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