Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f17cde1d0f832f…

MALICIOUS

PDF

73.5 KB Created: 2021-04-14 21:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d331feb9ebb75ace2bc1ed914208ebec SHA-1: cf15b4cb0464f10381be2f56299750e9bbb260ae SHA-256: 64f17cde1d0f832fc629d66b3467fc782ca486e355533f3fd99ed5bf8c1352ca
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an SEO redirector URL, specifically 'https://vilenefex.ru/strik?utm_term=deltran+battery+tender+jr', suggests a phishing or social engineering attack designed to trick users into downloading further malware. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct instructions or lures are readable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=deltran+battery+tender+jr PDF link annotation
    • http://tuwobezike.22web.org/61302752602.pdfIn PDF document text
    • http://wownatural.fun/wofibuvelijuvu1s2.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/gexovoriposuxiw.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/modowizazulatubulalefiz.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/rijewotovilimefadajozaser.pdfIn PDF document text
    • http://usesalon.xyz/shure_ulxd4d_firmware_mismatchr2pjc.pdfIn PDF document text
    • https://dirujewe.weebly.com/uploads/1/3/4/6/134677456/1172523.pdfIn PDF document text
    • http://fkpravo.ru/gotapiwxjz0.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/1042442804.pdfIn PDF document text
    • http://zazubabifuwor.iblogger.org/hamlet_soliloquy_act_2_scene_2.pdfIn PDF document text
    • https://wukodotimage.weebly.com/uploads/1/3/4/4/134487216/9902248.pdfIn PDF document text
    • http://carinsusa.info/karuppasamy_songs_listenxqh4f.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/3c385c3e-9ba0-4925-a63b-424ebfdd5ac3/desudotofinevele.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/cisco_ise_2._3_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/dikuxesajevit.pdfIn PDF document text
    • http://bawanakoj.epizy.com/83397453243.pdfIn PDF document text
    • http://niguroxutoginef.rf.gd/blogs_de_libros_gratis.pdfIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/11633398247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc95acf-20f4-43ec-8271-3f1aaf814e97/does_ford_focus_back_seat_fold_down.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/what_are_the_main_features_of_narrative_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee85cda9-0fdf-4237-afd1-71eb35b6ca34/22601070996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff93995-9b67-4c8a-94c3-56b58498a84a/why_is_my_honeywell_wireless_thermostat_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/photoshop_for_windows_10._exe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dfa606f-537a-4417-ab1c-46657e272851/31679137096.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/limeli.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_off0000e05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05D 4956 bytes
SHA-256: cc18a6ec1e9350fdb70342d3f2f01841c4f4ad6a1a6fabfbd8b52f3dfc170af1
font_01_sfnt_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 10868 bytes
SHA-256: 5a3ad30bdafe266f6a094cdb81989a9a7d778ef0316b24a71ac8a34c0bff1b10