Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d8af1320bff7ee…

MALICIOUS

PDF

76.0 KB Created: 2021-03-16 03:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7c7fe73ab121c35588a2d4495b09663f SHA-1: b576abafdbb3bb0b52650b34ddf4c766a591f687 SHA-256: 45d8af1320bff7ee60d8eff976f86acd2fec20cca3f85aca2b18603cf6af9541
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or a distribution mechanism for malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=cassandra+database+tutorial+pdf PDF link annotation
    • http://thrivewebs.com/89233809486gayjp.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/hdjf4i8/diy_fake_nails_with_things_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/JghWZic/bazesarulemuzikeriledavi.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/ieC5him/gobulawomigofiloxawufojoz.pdfIn PDF document text
    • https://cdn.sqhk.co/zajujinul/enVpuUn/44277267751.pdfIn PDF document text
    • http://erse.xyz/management_theories_and_modelsy6926.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/q5hcLjf/gangs_of_london_episodes_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/icQhgd0/kakukawimog.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/jimxwgi/mario_kart_tour_all_stars.pdfIn PDF document text
    • https://cdn.sqhk.co/rirelolut/gf8hcje/lamborghini_car_wallpaper_hd_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/bje5jco/mewisesuwitesob.pdfIn PDF document text
    • https://cdn.sqhk.co/tusifefovozu/0ijNgeN/solarxtreme_500_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b6fe53-95bb-41e0-8718-b4f5ef820541/panasonic_kx-dt343_manual_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45314a1-1762-4780-88bf-e402c55f35fd/12752327642.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_b70e3dd5aa044a89b9d1ab25c58b7c44.pdf?index=trueIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_ddbd2e0b40004a6192cb45e91f1030bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d01ede-ac8b-46d2-a601-2e53d6a69f34/50078365347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a414bfa-fadc-4ffa-b4e8-f3c2656782f5/zifavejodutuwudoviparur.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_33c4176ed26c41e09b22424c82ca9c57.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1bf0f78-0649-4fbf-afd2-d6f6b4cb7317/how_many_pages_was_the_affordable_care_act_bill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba35af0-85a9-41f5-ab86-b8a66cf8cf30/97639859035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca9984e-c603-4f6a-a95f-aef5decc2a80/employee_performance_review_sample.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_off0000ebca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCA 5080 bytes
SHA-256: 72c5553c6218e061ea7ab2731cc935e1da30dee0bd27134fc9f0715e540f29de
font_01_sfnt_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 11068 bytes
SHA-256: 2203b66c9c152985f2f48151b844c92268f4df9ed5747169292bcd72496a2125

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