Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed38d788d7aa7801…

MALICIOUS

PDF

70.3 KB Created: 2020-12-05 10:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e6fe9be1b47c7aafdaa8c22738448434 SHA-1: 16310fb5ebaa7b84711320a88a7c9126ab529a12 SHA-256: ed38d788d7aa78010bc8c04421ccc7d1d072b62676f9a1841fdc2b983348e067
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many pointing to S3 buckets, suggesting a link farm or redirection strategy. One of the embedded URIs, 'https://traffnew.ru/strik?utm_term=guild+starfire+iii+newark+st', is classified as unknown and is likely a malicious redirect or phishing URL. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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
  • 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://traffnew.ru/strik?utm_term=guild+starfire+iii+newark+st PDF link annotation
    • https://kidivine.weebly.com/uploads/1/3/4/5/134576756/lozitikepalifuz-febulipol-bapasuxob.pdfIn PDF document text
    • https://dajurejew.weebly.com/uploads/1/3/4/7/134753869/04671e0.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/xidegeloniro.pdfIn PDF document text
    • https://fodorofofojep.weebly.com/uploads/1/3/4/7/134769626/bixagowaseleg-zefifopudare-lezixobalosi-denutirosol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_5fa9c5275901f.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/lanorolowu/61573888996.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/born_this_way_concealer_shade_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/94480139193.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/psychological_realism_definition_social_psych.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c9893dfdd95b60ee01cf/t/5fc6dc27a3696915e2138e17/1606868008268/tejotuweramab.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/97203432439.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/pnb_online_atm_apply_form.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_off0000c5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A4 4860 bytes
SHA-256: 5972dc643f80a58ce9ba421dff3c72a8e64e58318105d3ea1ec8f25de812d092
font_01_sfnt_off0000d649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD649 11364 bytes
SHA-256: fbd13de80d4b9b404b109cd484ab68e8273d321e691433b04f802a70df9cbe80
font_02_sfnt_off0000fcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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