Malicious PDF — malware analysis report

Static analysis result for SHA-256 95829e894df046d2…

MALICIOUS

PDF

79.0 KB Created: 2021-02-02 12:19:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2a39c6989cad57dd37ebad3a96cfd5fc SHA-1: ee4891f0487a9e3ced8f04af5d719ccda8933645 SHA-256: 95829e894df046d2afd9c88e23eb11c292e8ce962169ffb13ac248cd3c34d99d
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a large number of external links, a common tactic for SEO spam or phishing. The document body, though heavily obfuscated, suggests a lure related to diet sheets. The presence of multiple external URIs, including one pointing to a potential link farm, strongly suggests an attempt to redirect users to malicious content.

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://bologen.ru/aws?utm_term=diabetes+uk+polish+diet+sheet PDF link annotation
    • https://wilegefozuf.weebly.com/uploads/1/3/4/3/134399327/5960085.pdfIn PDF document text
    • http://pamesiso.22web.org/40442558283.pdfIn PDF document text
    • https://nobozemesatib.weebly.com/uploads/1/3/0/8/130874372/kekizojisid.pdfIn PDF document text
    • https://xisedemagi.weebly.com/uploads/1/3/2/6/132681548/gemava-guvisefekoson-figefewez-noxumuku.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/cjdieSD/12677947028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451760/normal_5fd2d97f9e751.pdfIn PDF document text
    • https://gogovujogizog.weebly.com/uploads/1/3/1/6/131607278/sagonagenisubikid.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/hHgeRhb/44854989505.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/ZXicQhd/whitman_coin_collecting_supplies.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/WOhgvid/xabuwonelilinadozewireke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujujum.epizy.com/9216998957.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/1305544448.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/40938629589.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/73685940249.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/6195479121.pdfIn PDF document text
    • http://tujiritam.epizy.com/zuzewikinomuxazamufefumo.pdfIn PDF document text
    • http://jonegukum.epizy.com/celiac_diet.pdfIn PDF document text
    • http://gedaseda.rf.gd/common_aluminum_sheet_metal_gauges.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_off0000f8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D1 5156 bytes
SHA-256: 482b5c237888d59c06d5d39b6c3893658c4f1cc053351342ec5f0a167d873bef
font_01_sfnt_off00010a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 10768 bytes
SHA-256: 5c9627a78a6c5440a8d04af9682ee03577eaaa6e5e68b4e6cfb0e54e2e48a70d

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