Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbcb40e2a6571ed…

MALICIOUS

PDF

78.8 KB Created: 2021-04-24 05:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e09691df7e7a3fa48d4019df3201b7ac SHA-1: 4e10ac50d305ed6eec8ab0da1820cf9bb5dafe0d SHA-256: 1dbcb40e2a6571edc8c0d75d360a237fe55c70672267cb2e84e0f783f9a47bc5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users seeking technical assistance. This URL, along with other embedded URLs, likely leads to a phishing page or a malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/strik?utm_term=how+do+i+link+my+dish+remote+to+my+tv PDF link annotation
    • http://uscovidcharts.com/20437307189jq3vf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_600c35f7f29d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_601c873f1dee9.pdfIn PDF document text
    • http://kabofatifeda.22web.org/dizaj.pdfIn PDF document text
    • http://uscreditmonitoring.info/betololuduxud1bsbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_60178c8cdb839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420018/normal_5ffbf3b1af059.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481409/normal_5ff2c079601f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451757/normal_6035033e01828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428061/normal_5fdfccd4ce1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456982/normal_6028bf48470e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471692/normal_603ec0ecd3c55.pdfIn PDF document text
    • http://kmplitka.shop/beruzisabu35bf8.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/pozokimepe/bahubali_2_full_movie_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/dopixowamorumakuxepujoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/rune_factory_4_boss_taming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/arap_bahar_ve_trkiye.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/fezuguxolibivij.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/55363099101.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/57729440139.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/ultrasound_guided_left_breast_biopsy_cpt_code.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/pufikuxijawigizuketuxatif.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/molomabukawasoxij.pdfIn PDF document text
    • http://dusozizogotudim.epizy.com/banofatoxegegek.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_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 5136 bytes
SHA-256: a176791700f310dddbc365b3c490bf641a0afb89052fb33270cbc9bccc3537bb
font_01_sfnt_off00010729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 11292 bytes
SHA-256: afd0718edec8ef26f8ea13534c47c250ed342870cd81e77dd28f323ead9e5c06

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