Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b76fdcd844f919b…

MALICIOUS

PDF

69.2 KB Created: 2021-03-24 00:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 501d4e31d3dbf4baa26924461ca324be SHA-1: de684b1de07255569e7ba4dda6f07dc4226a33f8 SHA-256: 9b76fdcd844f919bc3e78f51be6a2be99cdd14e4daebb48a4be2fc37f2d5b36d
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The document body and extracted URLs suggest a phishing lure, likely attempting to trick users into downloading a malicious payload disguised as a legitimate PDF. The presence of numerous external links, many pointing to potentially malicious domains, reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://golowaki.ru/award?keyword=acrobat+reader+pro+pdf+to+word PDF link annotation
    • https://cdn.sqhk.co/pegidago/43ljehe/1256226106.pdfIn PDF document text
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/5012441.pdfIn PDF document text
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/c3c19.pdfIn PDF document text
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/gegovafilobefiv.pdfIn PDF document text
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/9747153.pdfIn PDF document text
    • https://cdn.sqhk.co/jodariwem/ZHcQigk/l_t_annual_report_fy_2018-_19.pdfIn PDF document text
    • https://nodirerivono.weebly.com/uploads/1/3/6/0/136052085/3487511.pdfIn PDF document text
    • https://manabaxijex.weebly.com/uploads/1/3/4/6/134626004/7358572.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/bRYWy6g/4_answers_quiz.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/bulitolabe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://danofawo.rf.gd/mazix.pdfIn PDF document text
    • http://judafigot.rf.gd/kovozajogis.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/ancient_words_lyrics_video.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/mubotenopufodipep.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/what_are_biederlack_blankets_made_of.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/update_android_9_samsung_s7_edge.pdfIn PDF document text
    • http://mezuvisudaduvo.epizy.com/special_26_movie_songs_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/flipkart_infinix_s5_lite_quiz_answers.pdfIn PDF document text
    • http://vuruketunuwu.epizy.com/balkenmher_reform_kaufen.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_off0000d143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 5160 bytes
SHA-256: e336d4541913dabe8adb47685a7346c5ee543070fdd1179a58f8d098ed82f6b0
font_01_sfnt_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 10428 bytes
SHA-256: de002e8a9b962366ef341839838628f9fbb9e90843cec692f9a43250a9f2b2e2

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