Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d610d43ff392f6…

MALICIOUS

PDF

75.5 KB Created: 2021-03-14 22:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 288b2e78cd6f312a2f2c0a0301b3fcaf SHA-1: 9f58a9dec332d794ae3cdcc63a3390fc440874c6 SHA-256: 92d610d43ff392f641eeb596dd74fc5566381d262f1fb3dc9f3fdfcfb93f1651
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, with one prominent link pointing to 'https://gimoguvi.ru/wix?keyword=ncis+los+angeles+season+9+episode+guide', suggesting a lure to a malicious website. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, increasing the likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://gimoguvi.ru/wix?keyword=ncis+los+angeles+season+9+episode+guide PDF link annotation
    • http://helpcenter.business/que_es_el_sistema_inmunologico_para_niosg6dwr.pdfIn PDF document text
    • http://mesretly.xyz/texavepidobofolosezuwl74x5.pdfIn PDF document text
    • http://sberin.xyz/berkshire_blanket_primalush_sheetsm24mf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/50828250828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb737501-eea5-4d78-b46e-aa2f29020e39/xegadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f235a1-fc1e-400b-b182-d6f6666260da/what_are_air_force_officer_ranks.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/effect_of_stress_on_job_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f4fb96-1959-4ee7-8757-ed65ce0bdef7/rolozuletelemexixidij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbef79c8-0008-4acb-a152-5a75ce1b3252/fundamentals_of_physics_10th_edition_extended_solutions_slader.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/61559301559.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/amazfit_stratos_watch_faces.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/salupetanuzuxape.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/how_to_use_a_calligraphy_pen_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95ce3bd5-eec6-4866-8b73-58acd572c05e/motorola_sb6141_hard_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789a07c4-4eb4-4ba7-a496-f3e012f25413/95078497289.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/kunufesakogu.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/b._ed_online_scholarship_form_2018.pdfIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_fac75914f0054635adc8f1cb6f57b76f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/435ebe14-84bd-4e1a-86c4-a5fabe8bedc8/73420430027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35873aba-b394-44a0-8e66-ab810b76343d/64933295065.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_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 5272 bytes
SHA-256: a81083b0a137a4946f34917c22354f7deefad7357b9622138763eec7d0b57e4f
font_01_sfnt_off0000fbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAE 10852 bytes
SHA-256: 0d9a7d0a5528d15be9d94f9dfa5145029efb690a27a31f53eb4dfa2251c465c1

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