Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5399a4cac1c3e7…

MALICIOUS

PDF

76.4 KB Created: 2021-02-27 07:37:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 437bfaeef8164f3eaa35d1f0435e3783 SHA-1: d1e2433b499193e1858a277428cad3cf68ba631a SHA-256: 1d5399a4cac1c3e79571ec3ba7d116703e432dfc3300d18dfa245b8bc3688a6b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and a heuristic firing for a PDF link farm, indicating an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=the+standard+life+insurance+company+phone+number PDF link annotation
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/8288644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_600cb6a55dfa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_601aee9eb96c3.pdfIn PDF document text
    • http://copytoshka.ru/17406851104rreu5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5fe2152101a83.pdfIn PDF document text
    • http://getbuiss.online/35815049327g0nzl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403143/normal_5fd34cd1b23a8.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/87dcd1e12c60a.pdfIn PDF document text
    • https://gejodawutu.weebly.com/uploads/1/3/1/1/131164152/9630092.pdfIn PDF document text
    • http://usblighter24.site/tuzutizuzewivivojidb0dj4.pdfIn PDF document text
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/194f42.pdfIn PDF document text
    • http://swast-group.website/eastman_guitar_serial_numbers515u5.pdfIn PDF document text
    • https://telabafulux.weebly.com/uploads/1/3/0/9/130969700/917b49a1c5e.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/bubeto/bhaktha_prahlada_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/foxit_reader_word_converter_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/laluruxadivigagi.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/piloxipokukulu.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/sujal.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/bird_in_hand_principle.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/avenir_font_free_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/95866559554.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE5 5468 bytes
SHA-256: b3a50e19cdb2d5e910cc4539b8bf2e68f2b4b8c267ae5ceadcbb47b91535cdfa
font_01_sfnt_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 10788 bytes
SHA-256: aa69016685134f09e10479895aed5bde1adba04999fc25470b5eafc3d9839a5a
font_02_sfnt_off0001160b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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