Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ffa30c4aa3e05a…

MALICIOUS

PDF

90.1 KB Created: 2021-03-28 00:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fda2d2ef697a3bd081eef1ecf1dc9df SHA-1: 70f797cbba991e406a1e4f9511bdc67de2100440 SHA-256: 46ffa30c4aa3e05abd55d78507f195a5505bfd4c18a28b52d1c6e96130e2e5a2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a likely intent to redirect users to malicious sites or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/aws?utm_term=distribucion+normal+estandar+inversa+excel+ingles
    • https://cdn.sqhk.co/nebemina/Kd24ohf/party_city_locations_east_brunswick_nj.pdf
    • http://nakotigolajeg.scienceontheweb.net/plantronics_backbeat_go_410_in-ear_wireless_headphones_black.pdf
    • https://cdn.sqhk.co/wegifopi/acjgNxr/dunetoriza.pdf
    • https://bimuwosexiwo.weebly.com/uploads/1/3/1/1/131164043/votod.pdf
    • https://vimititop.weebly.com/uploads/1/3/4/3/134339659/dixevubin_widimewogefit_senusigiramo.pdf
    • https://metiledozixav.weebly.com/uploads/1/3/1/1/131164016/letokeru.pdf
    • http://korixoludofuguk.scienceontheweb.net/ledoporubeg.pdf
    • https://japilulijerimu.weebly.com/uploads/1/3/0/7/130738614/6c24c85038de8.pdf
    • https://zegadakupoxak.weebly.com/uploads/1/3/4/7/134749069/toxevumavixewi_gufodilur.pdf
    • https://lujovimujesami.weebly.com/uploads/1/3/4/0/134019161/3652111.pdf
    • http://lafovug.iblogger.org/what_does_a_44_inch_waist_look_like.pdf
    • https://cdn.sqhk.co/reparepoki/4jajiAh/87877320752.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/neliwanij.pdf
    • https://cdn.sqhk.co/naludibeg/dJjficg/nifinoforenapidominib.pdf
    • https://cdn.sqhk.co/lekibapufe/hif5hiF/cannondale_xl_frame_size.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuguvoxoki/the_disaster_artist_watch_online_with_english_subtitles.pdf
    • http://lokakowevokeb.epizy.com/ford_mustang_ecoboost_fuel_economy.pdf
    • http://mupegutiwigo.epizy.com/kupapufuramijexegefe.pdf
    • https://s3.amazonaws.com/jitimesolagun/word_mailing_label_template_avery.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f72.bin
3020a88908732b6f6a149219e6098171e5715e3aa19f665eff4bd07c1df1d6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F72 5524 bytes
font_01_sfnt_off0001322e.bin
a82d9d6fd735865238e21ba0a2a5b143156b9fb275bddf50ce4c35b32a3a16ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1322E 12060 bytes

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