Malicious PDF — malware analysis report

Static analysis result for SHA-256 1554ca175240afa2…

MALICIOUS

PDF

72.1 KB Created: 2021-01-10 23:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 341fbb120520c31b2041db9f58c2e5cf SHA-1: 798e9f2e394dc0339d52f6f83f2403736b374241 SHA-256: 1554ca175240afa2cefa1b82ccb3b9455b60b9c22247666c8c8e1e8d04353a69
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'trafftec.ru' with a keyword suggesting a lure for free services. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many of which are likely malicious or part of a link farm. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution.

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://trafftec.ru/wb?keyword=free%20wifi%20calling%20iphone%206 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379854/normal_5fdd0393c2e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450260/normal_5fea46fc41dbe.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/regatipesa_xeboru_gomum_salogozove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fac3aec344c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5fcc8e2d45651.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/kasemumame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483361/normal_5fc3733ab74bc.pdfIn PDF document text
    • https://pajodiwid.weebly.com/uploads/1/3/0/9/130968992/sikaxiperuzeno.pdfIn PDF document text
    • https://wilalunawotepa.weebly.com/uploads/1/3/4/6/134608105/sileg.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/kotodur/dezelezezubefuvidego.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/76281479690.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/csun_class_catalog_spring_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/scripps_bee_word_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/over_the_calf_dress_socks_australia.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_off0000dc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC82 5300 bytes
SHA-256: 7ec251ddadfe05e418390ed82743388df80434a9d677ae96b88036650ca061b5
font_01_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 10828 bytes
SHA-256: 16b11cdb454656bbf4bef85943adaa83c9b5c5a19906dcf51b174fee35719771

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