Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d82dd81d77dcd1…

MALICIOUS

PDF

80.0 KB Created: 2021-03-14 14:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8ef5d7d592514e11f311b6b190f728ec SHA-1: 9a30ccd415af26f8d6706d0dbc2294a167f5fabd SHA-256: c2d82dd81d77dcd1e34adde989a73ea2e150296233d41e750958d1d4de8ae9c5
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://zajinet.ru/wix?keyword=made+pure+skin+cream+website PDF link annotation
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/8380154.pdfIn PDF document text
    • https://wofofubuw.weebly.com/uploads/1/3/2/7/132710679/576de569d.pdfIn PDF document text
    • https://cdn.sqhk.co/pipidopowewe/jasrJt5/nirusukovosifo.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/cgdgghx/radio_italia_app_per_android_phone.pdfIn PDF document text
    • http://boxidodo.22web.org/lirik_lagu_dongani_ma_au.pdfIn PDF document text
    • http://logowiwubapokar.iblogger.org/47782923113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_8dd30a8f993d4e5597357a106c958fff.pdf?index=trueIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_7960afcafa2a4d2ca31f12700a97d88d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suximawo/jijukesegunimifavoguninex.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/anexar_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/2773183633.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/stay_focused_app_block_apk.pdfIn PDF document text
    • http://tilebimelexin.epizy.com/44892626108.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/kudot.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/tafheem_ul_quran_english.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/nescafe_dolce_gusto_manual_vs_automatic.pdfIn PDF document text
    • http://vaxazovalijulut.epizy.com/garmin_forerunner_110_charger.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_d4987b44cc484491a2441f47dc62c8f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toguvaju/tezamiduxe.pdfIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_eddb603965684f46b1cf9c423ab750cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/my_singing_monsters_fire_heaven_breeding_guide.pdfIn PDF document text
    • http://kavezuvimibu.epizy.com/ativador_windows_7_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/folasinegik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 5488 bytes
SHA-256: 7814ca9db17b4402cabcdbe40512212b076000e5556c4660a13a50284c33d929
font_01_sfnt_off000100df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DF 2004 bytes
SHA-256: 987ec081f617d00e24081ca3d2a9be1a4463a13d0d2b8ecad5a5236e8349e5c8
font_02_sfnt_off00010a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5D 11188 bytes
SHA-256: 072ff3285ff5bebff8cefb6e5855070b678e8f89d863b83ebd9e8dc883a162d0

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