Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d578b596113aaf…

MALICIOUS

PDF

73.0 KB Created: 2021-01-21 02:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2b4e423519c5a1acae307d138bcec147 SHA-1: eaf37dd53de6813f52f9f66d974b7702cd2d4e89 SHA-256: 59d578b596113aafba2ddd9c67d767ac6decc5a39dfb074c276de332c82e1d0e
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirectors, indicating a phishing or scam attempt. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected it as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and appears to be junk data, but the presence of the 'utm_term=beyblade+cartoon+mp4' parameter in a URL suggests a potential lure, though the primary function is link distribution.

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
  • 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.
  • 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.
  • 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://yafferge.ru/aws?utm_term=beyblade+cartoon+mp4 In PDF document text
    • https://nulabelavomeviz.weebly.com/uploads/1/3/1/4/131413951/b398a73557b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f95353a167b2.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/likasikin.pdfIn PDF document text
    • https://diwujuxopawarow.weebly.com/uploads/1/3/0/8/130874606/6fa9e654e956757.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/vijukanunoru-laloxar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471686/normal_5fb921110e88e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5faec9e7059b5.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/xexap-sokomirafaf.pdfIn PDF document text
    • https://site-1223593.mozfiles.com/files/1223593/30487669576.pdfIn PDF document text
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/pidufaf-lukaguduxal-dajawovipeguriz-bujopub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5fd79cfe128ee.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/nufonav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414159/normal_5fe52d74bdfaa.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
    • https://s3.amazonaws.com/rurosaveruk/28744060676.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE70 5160 bytes
SHA-256: cc3798b081b0e51ed690497033efd926a4d819f54a4234af92dcf7a217ea7958
font_01_sfnt_off0000dfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE3 13884 bytes
SHA-256: 64e6cdc7af66bef88576c85fa1e15583f1733e3ec4a64286e114f997f84e1c8c
font_02_sfnt_off00010972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10972 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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