Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9a5ee80b326d1a…

MALICIOUS

PDF

67.9 KB Created: 2021-03-08 15:38:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ae7da008167910cdf699e1f090a266dd SHA-1: 051f72f8bb0600eb31a90c6456cd4557d741e4ad SHA-256: cd9a5ee80b326d1a2a1f972c25a1e319f00c4c6c9c4df346a21b1d0701c427ca
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/aws?utm_term=ugly%2527s+electrical+book+2020 PDF link annotation
    • https://zirowebepalijiw.weebly.com/uploads/1/3/3/9/133986526/detaruw.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/how_to_connect_hp_printer_to_wireless_network_on_mac.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/alexander_the_great_movie_online_subtitrat.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/xilenugawu.pdfIn PDF document text
    • http://fresh-ita.space/11381872101zhysg.pdfIn PDF document text
    • http://esmoney.site/jafiwozujamufosefulnscl.pdfIn PDF document text
    • http://islta.fun/what_is_domain_model_with_examplewpp9q.pdfIn PDF document text
    • http://filemarker.store/tadulatebugibid7san9.pdfIn PDF document text
    • http://hookup750.website/after_livro_2_onlineo03ou.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/xilitusuzujupe.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/pibavevutowon_nepimuwos_povumik_jelen.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/igpKicc/patizag.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/how_to_connect_my_bluetooth_speaker_to_my_roku_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/fJhjJcC/zozuxijix.pdfIn PDF document text
    • http://yesitalia.fun/75446934201h7la4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13aa2fa-3674-4dfc-88ec-f40c125a9ab3/foluwomekatisesupusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce5d5d5-9902-478c-88c1-b3ee265f2f2e/the_merchant_of_venice_bassanio_characteristics.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/tabla_de_conversion_de_centimetros_a_pies_y_pulgadas.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_off0000c9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BA 5572 bytes
SHA-256: 365694d9da390a7815094bb460c1ddb71c093844bd2d3d855ae95d199c3d1da2
font_01_sfnt_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 11112 bytes
SHA-256: 5297d48d2f7524e6cc8dfcf1a9299c6d9e56b47b778b1cce253998367aacb0bc

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