Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a16641f30519cc8…

MALICIOUS

PDF

105.2 KB Created: 2021-01-22 20:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 77f7d14538cdc2f91b5b119c5abd6df7 SHA-1: b97259a9405ba46d57f774ea49d3de18924196f4 SHA-256: 1a16641f30519cc84bba23f3e28459118d7f4f4b3b57fe3afb88322fd88af7c8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffking.ru/123?utm_term=chemistry+lab+report+format In PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/saronoxugonaxeluvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459785/normal_5fd28fda6ee6e.pdfIn PDF document text
    • https://site-1202150.mozfiles.com/files/1202150/58996236762.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5ffdcc30de9c3.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/lafezun_zarol_dudusagagukivek_rizigetet.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/dujado-norisivubil-xodigaduximo-liwefobi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409998/normal_5ff8d811eaf2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5fc5c49910b48.pdfIn PDF document text
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/1e23a7.pdfIn PDF document text
    • https://site-1178192.mozfiles.com/files/1178192/96978408065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_6009df37da2d2.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/tarofowewopubuge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463263/normal_5ff7c82bdf9fc.pdfIn PDF document text
    • https://setowunujabid.weebly.com/uploads/1/3/4/0/134095848/8f45df79e5ac26.pdfIn PDF document text
    • https://lamamamim.weebly.com/uploads/1/3/1/6/131606140/2e467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_5fd799b31ce61.pdfIn PDF document text
    • https://site-1168315.mozfiles.com/files/1168315/kelujozobutusel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494146/normal_5fed441016e2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449424/normal_5fd3caecf32bd.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/pigolo/powerpoint_themes_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/11835519258.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/handlebars_template_array_index.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/kawivufolebakip.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A9 5288 bytes
SHA-256: c3b01953fef511f91f190a36dee67fd79f23fb8fe7a889b7a7204cf8dda0d114
font_01_sfnt_off00015874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15874 12064 bytes
SHA-256: 687e9bb0ecba51e555c7ce93fc42302cf5bafc9193efe43043230c64dd9195b0
font_02_sfnt_off00018196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18196 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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