Malicious PDF — malware analysis report

Static analysis result for SHA-256 86589a11df01cb6b…

MALICIOUS

PDF

76.8 KB Created: 2021-03-30 16:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f34ea90e4190a94581be1402bad17cc1 SHA-1: be7dde91d5274b3067e6463cca0405b3c1c5be08 SHA-256: 86589a11df01cb6bf363228e0a82f6e1125df7db445f26ffba00d4bc6dc28193
156 Risk Score

Malware Insights

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

The PDF file contains external URIs and a link farm, suggesting a phishing or SEO spamming attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

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
  • 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.
  • 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://vilenefex.ru/wix?keyword=free+v+bucks+without+human+verification PDF link annotation
    • https://zoluwapipapak.weebly.com/uploads/1/3/5/3/135321816/kugubinabelol_zeboji.pdfIn PDF document text
    • https://memapuzubabevu.weebly.com/uploads/1/3/0/8/130813849/6798045.pdfIn PDF document text
    • https://zuxivojeduzudog.weebly.com/uploads/1/3/1/3/131381782/wakakumufamop.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxeneson/VTbIGUg/padibikufupijuwoz.pdfIn PDF document text
    • https://cdn.sqhk.co/rubalibuzodi/SHjdjc6/35042088111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_e6262b04aa4143f196494bea784134c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubeto/zodarogov.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/mubezadidivuxoligi.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/mole_to_mole_stoichiometry_problems_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d1d67f-af7d-443a-af6a-c9c1f6ec5a53/jevilolebefik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e81345-2891-4046-8915-ad33b742ed5e/dell_latitude_e6430_review_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/37029162011.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/alan_carr_easy_way_to_stop_smoking_amazon.pdfIn PDF document text
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_da2409b4836c4559b790885e78f39080.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/chopai_sahib_path_in_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/33916822063.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/valalixuxegoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3f8445-92ce-467c-8e2a-6b8430ad0cd1/baldor_algebra_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a35570f3-699b-443d-a0fc-2481b8c97aad/vaya_con_dios_what_a_woman_lyrics_youtube.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_off0000ee28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE28 5400 bytes
SHA-256: 3c067708c49c88571cbbda3fd8e8f115ed7887d52201234725e8116ef6b2871d
font_01_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 11068 bytes
SHA-256: 5c1ba6948ce348461f8f931b40600ae3090639526d44caa49ea66b8e0d97d22e

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