Malicious PDF — malware analysis report

Static analysis result for SHA-256 561e1fd1406f49bd…

MALICIOUS

PDF

75.8 KB Created: 2021-03-08 08:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0071da05ba89e7282a2e93b8d3b78980 SHA-1: 915a870cd7c32a1343d252c190ae5b482f5b99a6 SHA-256: 561e1fd1406f49bde2aee35b3e2fe76786e4c2ce69773de331c90d6403bc01c4
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a 'download button' lure further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wb?keyword=how%20to%20reset%20a%20kenmore%20washer%20motor PDF link annotation
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/7186714.pdfIn PDF document text
    • http://instapriz.online/98477774336e4vys.pdfIn PDF document text
    • https://waretopaze.weebly.com/uploads/1/3/4/5/134529701/e70f72035d184.pdfIn PDF document text
    • http://prechambre.xyz/559639175664e0f9.pdfIn PDF document text
    • https://fiziragib.weebly.com/uploads/1/3/4/3/134345091/sezuweximubelix-wuduke-rorozoxiti-vozegifabiw.pdfIn PDF document text
    • http://novubelugalij.medianewsonline.com/sarufimoxirifikabe.pdfIn PDF document text
    • http://kursi--kosmetologs.site/pandemic_ebt_virginia_november1pd27.pdfIn PDF document text
    • http://tajuliwelofiti.medianewsonline.com/how_to_use_financial_calculator_to_calculate_pv.pdfIn PDF document text
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/zujirupenaxez-wepigominuwakar.pdfIn PDF document text
    • http://lishop.site/12th_chemistry_book_volume_1y2eqr.pdfIn PDF document text
    • https://ritiburup.weebly.com/uploads/1/3/0/8/130814353/635749cc0576.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/Whbhdgc/lapitarujiwej.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/crhcQ1b/ultimate_car_driving_simulator_classics.pdfIn PDF document text
    • http://impergamon.com/pewuzizegabedisil8p9n.pdfIn PDF document text
    • https://cdn.sqhk.co/buwowunuras/eigndG1/31441242939.pdfIn PDF document text
    • http://techanomic.com/how_to_do_the_entrelac_knitting_stitch6k8bm.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/pSticzz/66129554773.pdfIn PDF document text
    • http://hightrade.club/busidevopajayctce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_8d4e6a682aea4b48869b662603bc862f.pdf?index=trueIn PDF document text
    • http://jujuletofu.onlinewebshop.net/velocity_vs_time_graph_simulator.pdfIn PDF document text
    • http://romofimor.onlinewebshop.net/hp_printer_release_dates.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_8e4d741d76b946afa4016234f4db8194.pdf?index=trueIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_6fd7217faec7428294f7450b0d1f2afb.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_bde55c481fda4ff7a69402b3e0875dd9.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_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 5008 bytes
SHA-256: 5015955f3106fba3016ca129e23d1d624f2ed3aa54ee5335b32334b043f7bf58
font_01_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 10912 bytes
SHA-256: 6da4c3446a389a8a3096f595be3acfbd099a77246c06e7a3e6082494bff945df