Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c07b68c817ed04…

MALICIOUS

PDF

85.6 KB Created: 2021-03-17 01:27:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 510ba85532bf6e32895dc16a72f9b194 SHA-1: 2a47899ae3e3545a4fe8bd609c584d5b7c021fc4 SHA-256: 60c07b68c817ed04fd218bc7ac6bb2d00820f36542a731c0a70f2a07c9851c91
226 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. Heuristics indicate a high volume of links pointing to disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jacksth.ru/award?keyword=ejercicios+examen+toefl+pdf PDF link annotation
    • http://pixidilivutep.medianewsonline.com/autocad_underlay_hide_border.pdfIn PDF document text
    • https://befinutu.weebly.com/uploads/1/3/5/9/135971501/4150383.pdfIn PDF document text
    • http://makoxiniponino.iblogger.org/how_to_change_background_of_picture_in_paint_youtube.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/9317352.pdfIn PDF document text
    • http://ig-supportcenter.xyz/mingling_of_souls_videosslv36.pdfIn PDF document text
    • https://zakulupibuwuvos.weebly.com/uploads/1/3/4/6/134686441/jafudav.pdfIn PDF document text
    • https://kifakofaw.weebly.com/uploads/1/3/4/0/134016777/jemul_tapumuzez_vufegukifore.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/46663362940.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/zojikalaxadam.pdfIn PDF document text
    • http://dreamingdeveloper.com/annie_dillard_total_eclipseo4qnk.pdfIn PDF document text
    • http://xexisutufas.iblogger.org/novedo.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/advanced_analytics_with_spark_sandy_ryza.pdfIn PDF document text
    • http://leyloften.online/safety_glasses_prescriptionk6whd.pdfIn PDF document text
    • http://3203epworthcres.com/the_blind_side_book_onlineuw5ik.pdfIn PDF document text
    • https://jitugexe.weebly.com/uploads/1/3/0/9/130969989/9326011.pdfIn PDF document text
    • http://lareluso.iblogger.org/dayton_drill_press_model_3z919f_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_a05adf589ea54495bfe5fbe2d954e6b0.pdf?index=trueIn PDF document text
    • http://maxuluxusit.atwebpages.com/xokubulexoxirenasuju.pdfIn PDF document text
    • http://lojogijenijuf.epizy.com/bryant_plus_90_furnace_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccab86da-29f1-4f2e-bd03-dd5efdd999f9/powejixuzojag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e1de6d-0c2e-4258-82cd-855f7ef4e48e/tubuz.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_794c4f4c34224dc48f593ff2ce0b16fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad83273b-949c-43b8-9c13-207f1e3a31a2/asp.net_tutorial_microsoft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a87be9-bc36-4dfe-a729-580984271312/gitinop.pdfIn PDF document text
    • https://f78a7b13-e75c-4ddc-9f3c-03cd83736f6c.filesusr.com/ugd/90c53f_cec5fbfad9204fd28dec48738b78f906.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c80792-b405-44b5-a7ab-5a40f18eed11/12617066808.pdfIn PDF document text
    • http://kidojudal.epizy.com/rakulagiwedowevajefe.pdfIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_bd29491600a548f9b0f6bab78d71ed39.pdf?index=trueIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_1d120109fd704c1fafb092b55b1c3fd4.pdf?index=trueIn 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_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 5400 bytes
SHA-256: 9d185aa83d9866c88809b75c7ac3c80b6c57a45d5e05d5563cd3be6b18351718
font_01_sfnt_off00011fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB3 12028 bytes
SHA-256: a7b8bd15ea6b36fac4aad16ddaf4ad80f20c39a61ef9efaf89eadda249b83405

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