Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4ed9cbb66f26d0…

MALICIOUS

PDF

86.2 KB Created: 2021-03-11 14:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 41f0da6fc95dc2442bfe14b69ad36dae SHA-1: f16ee34beb6a1d4d7616e352ed31411d156faec4 SHA-256: 2e4ed9cbb66f26d05c715009ee9d1fb70f80749f1d2d24b42b242c6c00837640
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or unknown domains, suggesting a link farm or redirection scheme to deliver malicious content. The document body, though heavily obfuscated, contains keywords related to the PDF's purported topic, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/award?keyword=atomismo+logico+russell+pdf PDF link annotation
    • https://cdn.sqhk.co/raxuzuvuluf/jarSTgi/sulafuxesefudozevuwav.pdfIn PDF document text
    • https://cdn.sqhk.co/xesenames/xjaXEhc/96176248040.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/lezimadaweguger.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/hjiB4gh/44461864967.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/why_wont_my_hot_tub_heat_up_all_the_way.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417519/normal_5ff5c58ba647d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484993/normal_5fefd85557275.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368768/normal_60087b00da93e.pdfIn PDF document text
    • http://gaximivotekole.mypressonline.com/badulebipidid.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/biblia_descargar.pdfIn PDF document text
    • http://talajifit.mywebcommunity.org/huckleberry_finn_quotes_about_the_mississippi_river.pdfIn PDF document text
    • https://xurobogi.weebly.com/uploads/1/3/1/1/131163732/pipit.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/2157114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_6026f1df5874d.pdfIn PDF document text
    • https://zopokirupinurow.weebly.com/uploads/1/3/1/3/131381130/zefilamosaxaja.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/7274740.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/womarom.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/FzGiggf/tonixetonativinofuz.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/zalubiluto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453144/normal_6024a133711ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/advanced_trauma_life_support_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/zumixu.pdfIn PDF document text
    • http://kubowulurarekij.myartsonline.com/9927419653.pdfIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/evap_line_vs_faint_positive_blue_dye.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/neverending_story_dog_or_dragon.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE8 5252 bytes
SHA-256: 8f368f68a4272af80f9878209d4d0d6fd00a6bf933887e06f3fc86d23d098507
font_01_sfnt_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 12812 bytes
SHA-256: 167fc318595b025a0c90e309615c02764fb91be75b130887f5929efdad2dac6c
font_02_sfnt_off00012685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12685 10576 bytes
SHA-256: f9c321008f82c405818410ddc5bff4cc25ed5643511eb4fd1ded3434d0a2deea