Malicious PDF — malware analysis report

Static analysis result for SHA-256 617284066ab1eadd…

MALICIOUS

PDF

73.9 KB Created: 2021-04-03 15:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2ebd0660be326e8be8e28b121f0d4596 SHA-1: 854e2c3bce9a4cc51113add1d4285f126c539413 SHA-256: 617284066ab1eaddccd078a2546b29130cb000a2a176e2c06b0c2c22baccf297
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/wix?keyword=mass+percent+composition+worksheet+with+answers PDF link annotation
    • https://cdn.sqhk.co/xufaribo/ggkhd8c/my_baby_care_games_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nowazedadara/ghififS/weather_in_plain_city_utah_tomorrow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6014c36946e71.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/hghXZJT/xezodugenimitadubafanuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464732/normal_603177276bd0b.pdfIn PDF document text
    • http://rozapunu.22web.org/75548120711.pdfIn PDF document text
    • http://kajopikika.22web.org/39841466955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_604e7504b2100.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462376/normal_6006605356341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486563/normal_60252914b4a84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454046/normal_601625cc67a8c.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/RjgAU97/plants_vs_zombies_movie_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5fd12d51e2cea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415537/normal_5fee9a046f402.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_7ee3277e8b1d4041b9ca91f1e78d316b.pdf?index=trueIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_aee8596788f74d8099cf826f27f00b34.pdf?index=trueIn PDF document text
    • http://vuzejonesiji.epizy.com/buvijevoxemukezexoderi.pdfIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_fb5d8eb85de54404aa8a401b08d113cc.pdf?index=trueIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_d8c1fe2a3cd44505af9a861eb4b3df71.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F9 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000e33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33C 5300 bytes
SHA-256: 729ded372ea6fd764bf8c315ea56b324bac737c4fec716df490e9af1239a35c2
font_02_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 10156 bytes
SHA-256: b8cb2f9de7a5accba69fc731b07fd1e4d25fa834f68b8f70ab77743a7b3d8826

Open this report in the interactive analyzer, or submit your own file for analysis.