Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26079667c969e9f…

MALICIOUS

PDF

75.4 KB Created: 2021-03-19 13:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fced25dadfd3790b3afbb5d4487e265a SHA-1: eae58b9fe3eb764c55f60fdaac4553a49ec15745 SHA-256: c26079667c969e9f2c69af8c77073df7c5e78edd0009ae2cb6d18627af2d3393
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/123?utm_term=crystal+reports+versions+and+release+dates PDF link annotation
    • http://fegokodelaxen.scienceontheweb.net/black_s_law_dictionary_8th_edition.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/how_to_connect_hp_deskjet_3050_to_wireless.pdfIn PDF document text
    • https://ziwolowuwuxux.weebly.com/uploads/1/3/5/3/135321756/4785663.pdfIn PDF document text
    • https://sinujezujano.weebly.com/uploads/1/3/1/6/131606051/pasilemiko.pdfIn PDF document text
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/7596274.pdfIn PDF document text
    • https://lefipotadap.weebly.com/uploads/1/3/5/9/135959992/9243278.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/5569609.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/vezukir.pdfIn PDF document text
    • https://vavetoros.weebly.com/uploads/1/3/4/8/134854671/sanara_dadamek.pdfIn PDF document text
    • https://semogabetik.weebly.com/uploads/1/3/1/4/131482882/72f2d9abae.pdfIn PDF document text
    • https://lagisarer.weebly.com/uploads/1/3/4/1/134131240/3206861.pdfIn PDF document text
    • https://sisivijujejaliw.weebly.com/uploads/1/3/2/7/132741673/a14db88.pdfIn PDF document text
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/7ae8c3cf656.pdfIn PDF document text
    • https://tisawisapapaw.weebly.com/uploads/1/3/5/3/135326074/c5852cd08.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/xepiwadelune.pdfIn PDF document text
    • https://bimefitovaj.weebly.com/uploads/1/3/1/4/131437299/4171482.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/51d4304a-d5b3-4824-835b-768a7f7a8795/penazibepu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/85536705159.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/messenger_older_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/what_can_i_do_with_a_real_estate_salesperson_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16082aa4-c710-4551-a432-35d253af1c4f/what_is_an_organizational_profile.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/virapavogez.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/sheet_music_piano_beethoven_moonlight_sonata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653b475f-85a0-436a-99e5-5c5391a978cb/befubufopipifuserosogugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d638ad-fbdf-41d4-90c0-7333f20232a7/14507374676.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_off0000e9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D3 5020 bytes
SHA-256: acbfdfb93a5be28941cf843175c0bb9bd75a885d54e2ea31d988312d93eb9bc0
font_01_sfnt_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 10872 bytes
SHA-256: 833be511140700438c318e8d2dc02f979c9ff99f325d9f9a0d063c04eb1dd778