Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d13002f550b3ca4…

MALICIOUS

PDF

73.4 KB Created: 2021-02-17 19:45:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 70257a170d949973675ad9fd76869d7c SHA-1: fb8ac0e6b4af0563a846ea6b745b9b94dae6182d SHA-256: 9d13002f550b3ca4b1d2843e64237867c6552f4fd153ba53d33827713f3c2592
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains a large number of external links, with one prominent URL pointing to 'baarspo.ru', suggesting a link farm or phishing lure. Although no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=introduction+to+statistics+in+psychology+6th+edition+pdf PDF link annotation
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/1cfa485700.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/segaxogovafabin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/backup_recovery_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/bluetooth_windows_7_software.pdfIn PDF document text
    • http://nesitojogosew.epizy.com/arduino_project_code.pdfIn PDF document text
    • http://keluwuvofaj.epizy.com/hand_bracelet_images.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/duxuvojonajowunore.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/bamikoxifizatikixefu.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/zunujoforewelipuserete.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/best_greek_lexicon_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/28074830598.pdfIn PDF document text
    • http://bowedaliwerox.rf.gd/22469859879.pdfIn PDF document text
    • http://zopatirek.epizy.com/fosiwuvuduz.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/genikapinasasafifuwowe.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/calico_critters_luxury_townhome_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/air_fryer_cooking_times_cheat_sheet.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_off0000d3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 5492 bytes
SHA-256: 96d925a151af615af5eaa4335ffb09f64a2d5504007c6b25ee24639db6723c28
font_01_sfnt_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 10452 bytes
SHA-256: b0ff6e35690403234368abf69548ee0d48b523ba6159af67a1ecd9c283c6107a
font_02_sfnt_off00010a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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