Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fdc19bc93a2a08…

MALICIOUS

PDF

75.5 KB Created: 2021-05-08 18:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4091dfc3389fb356b0de632e7464d9da SHA-1: e8fa59834287d7f5dda194c2171dac534f609ad7 SHA-256: 05fdc19bc93a2a08607d27b9ebbde4fbec14981afc1b9e0b81d300e9f4c3444d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of external URIs within a PDF is a common technique for delivering malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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/strik?utm_term=omb+circular+no.+a-11+%25282020%2529 PDF link annotation
    • https://cdn.sqhk.co/vedukosamo/grgd4hc/folk_religion_meaning_in_bengali.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/YUkjagc/god_deck_mtg_arena.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/qvhfiGK/sw_passive_color_strip.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxevabuvix/eAifxO3/82564821324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5fd687759316b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494165/normal_6045425a968bf.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/CidNU3e/cat_goes_fishing_2_apk_hile.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ichbMs1/globe_load_philippines_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5ff85d41a86ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fe6de5224593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_6067ead8956db.pdfIn PDF document text
    • https://cdn.sqhk.co/lamidipeke/igjXRge/abernant_primary_school_uniform.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.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/fadedosi/bmat_section_3_answers.pdfIn PDF document text
    • http://difadedox.rf.gd/17800769267.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/51190872446.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/rgb_color_chart_for_bloxburg.pdfIn PDF document text
    • http://jiforexawa.rf.gd/87553512576.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/famamapidowevino.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/how_do_you_use_pascals_triangle_in_everyday_life.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_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 5476 bytes
SHA-256: f3f8c2eb4e939b77556b23e968b0eed2b629f5be31a04f5eb33b054fc2e94190
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 10796 bytes
SHA-256: 70fdc72ca62ea9a520a8a70339491b180f7d419d9517a951c99a5409eee5fe6a

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