Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd87707c29883ffb…

MALICIOUS

PDF

96.9 KB Created: 2021-03-14 23:56:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b08a29298b7d7ce6631eb91b91a4cf8d SHA-1: c3a2ad87cc2d46cbe8ec8ece670600c865669ad7 SHA-256: dd87707c29883ffb9b175b3601ff5b1050f6d9316f52bc2c98b0f46a63c5e756
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting or redirectors, indicating a link farm designed to lead users to potentially malicious sites. The heuristic firings, particularly 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM', strongly suggest a phishing or scamming attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=strike+force+heroes+unblocked+hacked+66 In PDF document text
    • https://tawusizigegik.weebly.com/uploads/1/3/3/9/133997505/2441679.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/ie5WOge/crazy_beta_online_shopping_store.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_604d207a5ba27.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/btPVtjd/tip_top_roofing_company.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367624/normal_5febf22f6ce8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_603ee22fc7232.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486778/normal_5ffa80be30e6e.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/zhjhiGa/earthlink_webmail_login_problem.pdfIn PDF document text
    • https://duloduwo.weebly.com/uploads/1/3/4/8/134850843/fb907ed6403c1.pdfIn PDF document text
    • https://vewudati.weebly.com/uploads/1/3/0/8/130873955/8ac4fc.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/JfbggSy/list_of_2018_pop_music_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/hhkijji/run_bird_run_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_5fff0b3295bc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_6049d8083a633.pdfIn PDF document text
    • https://cdn.sqhk.co/negolura/hcbBTe7/ted_baker_dresses_us.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493282/normal_5fd8732df2a93.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/ctIgejg/golden_boot_race_2020_england.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fe8ff44830ca.pdfIn PDF document text
    • http://kokusurajiguz.22web.org/zapf_calligraphic_801_bold_font_free.pdfIn PDF document text
    • https://dabesego.weebly.com/uploads/1/3/2/7/132740865/2074906.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/7341701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407331/normal_5fe24347863b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://damatagowigiz.epizy.com/1591625857.pdfIn PDF document text
    • http://labotiz.rf.gd/buy_fl_studio_producer_edition.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/83159576930.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_off00013cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF9 5568 bytes
SHA-256: 62d2fd2aa29311160c91c090a27edab985b7a878c252cc6148caff9eb3d477d4
font_01_sfnt_off00014fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FE2 11168 bytes
SHA-256: 6e397f4a5c7081bb824c43a34b361db49e3327f727b0fccc6ae92039efd6004a

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