Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aacceae50a10804…

MALICIOUS

PDF

76.7 KB Created: 2020-11-18 08:35:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6a5aa226dab48e58d67ec4981d99c549 SHA-1: efdacc804ac685fba83b7fc7617e71d4129e6929 SHA-256: 5aacceae50a10804f217dbbb79ac289e7a985c5fe50cabe106255c9a92a1fef7
222 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on Weebly and appear to be part of a link farm designed to obscure malicious destinations. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'Garmin etrex 30 manual pdf download', suggesting a lure to disguise the malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?utm_term=garmin+etrex+30+manual+pdf+download In PDF document text
    • https://mafopobivo.weebly.com/uploads/1/3/4/3/134322173/8143382.pdfIn PDF document text
    • https://fobolobal.weebly.com/uploads/1/3/4/3/134317950/piduki.pdfIn PDF document text
    • https://purowuma.weebly.com/uploads/1/3/4/4/134472698/norepisovutofe.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/c000471e.pdfIn PDF document text
    • https://nutefowamedez.weebly.com/uploads/1/3/4/3/134330341/dewiluzikabore.pdfIn PDF document text
    • https://misurabize.weebly.com/uploads/1/3/4/6/134666879/tewajimepufi.pdfIn PDF document text
    • https://vumorusumanipav.weebly.com/uploads/1/3/4/2/134234742/0a99d84d871a7d7.pdfIn PDF document text
    • https://diwejixa.weebly.com/uploads/1/3/4/6/134629966/6edaff45.pdfIn PDF document text
    • https://bevokelas.weebly.com/uploads/1/3/4/3/134310014/tixus.pdfIn PDF document text
    • https://nasefowiwawenug.weebly.com/uploads/1/3/4/1/134109082/1175572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b7bd7d-8f75-4b20-8663-a312be93b469/darwin_s_dangerous_idea_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/53956081847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b1386a-348e-476e-b971-787d7e95896d/49914074669.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/nafujazezuga.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/gugatudikajemiwataj.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/abbyy_transformer_pro_3._0_full.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/identifying_genre_sub_genre_and_authors_purpose_answers.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_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 5504 bytes
SHA-256: 485c85c5a261ff128576f6573352d8b9ca66c0308f3bfd6a2820e5db9d20b18e
font_01_sfnt_off00010264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10264 10460 bytes
SHA-256: 7cda0208e92b91ccec47e8388909e43c565d9f6bd24745d8a9413e339de9a718

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