Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a693d658e70ad1…

MALICIOUS

PDF

81.2 KB Created: 2021-04-06 03:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3443eec00deac185a165f31384e598bb SHA-1: 74b9b5e59e55b4c09119a327625575871954be0d SHA-256: 96a693d658e70ad16be51547d155c5291e5faa568e802aae758a4f47fe1a6ebe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://midufefew.ru/award?keyword=diagrama+causa+efeito+pdf PDF link annotation
    • http://sluzhba1.net/what_is_the_chronological_order_of_avengers_moviesl7eyd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486192/normal_6037d80839d04.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/gubovanabogifun.pdfIn PDF document text
    • http://kapimivibix.22web.org/benim_hocam_kpss_ders_notlar.pdfIn PDF document text
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/963719afdd97c1f.pdfIn PDF document text
    • http://sadovik.me/how_to_use_3d_paint_to_make_background_transparentcj3b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_6063b76036deb.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/wipawisigib_rijotusofinu.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/15318276986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_602536a7baa92.pdfIn PDF document text
    • https://dalivesozugu.weebly.com/uploads/1/3/0/8/130813395/6367434.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/jizalixi.pdfIn PDF document text
    • https://zunudomulu.weebly.com/uploads/1/3/4/6/134604261/xodufeguwovukuxewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bomemab.epizy.com/cinema_4d_free_bagas31.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/how_to_find_the_fgx.pdfIn PDF document text
    • http://ximawefab.epizy.com/ssc_mts_answer_key_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 5216 bytes
SHA-256: 13e92b36fb0726c2182aa6441941d1897477f0bbdba81dc7370981f3cbdc03e4
font_01_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 13280 bytes
SHA-256: 9b431bffb71b62e35123bab365607aac87bcc419a513f7a7b4398b5c7ce1eaa5
font_02_sfnt_off000127ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AE 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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