Malicious PDF — malware analysis report

Static analysis result for SHA-256 7645671dc7162324…

MALICIOUS

PDF

101.4 KB Created: 2021-03-19 04:18:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1d1cfe27346bcf056af24634648291eb SHA-1: 626128bd9609340a35358b2a2cf67059e9cf7bad SHA-256: 7645671dc71623245996850e71b0d14e54d6b53def4a3a934ddebea4d0384fd5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm designed to direct users to malicious or phishing websites. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure and heuristics indicate an attempt to redirect users, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/aws?utm_term=what+concealed+meaning+does+the+poem+fire+and+ice+depict PDF link annotation
    • http://form-lnstagramcopyrightservices.com/white_tiger_movie_netflix_castvktbv.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/1hdx6hj/wd_my_cloud_ex2_ultra_review_plex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379855/normal_5fd06baddd3ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454990/normal_5fe6cfb3aa44c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5fed9799c42a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504641/normal_5fee55073d020.pdfIn PDF document text
    • http://amaryllis.space/pipekokosaxizabamintx97g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381546/normal_6040551178199.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401985/normal_6000f3b1aa324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471719/normal_5ffdd2bd19e3e.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/f0tEUjf/jakobegaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5fdc5307b3676.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://bodegifu.atwebpages.com/how_to_clean_printhead_on_hp_5255_printer.pdfIn PDF document text
    • https://54e283d8-6946-47af-b6e3-c78582312647.filesusr.com/ugd/22cd47_19640071b73e46cf822716b267898998.pdf?index=trueIn PDF document text
    • http://pikubub.onlinewebshop.net/zilegetuzudunedulijanu.pdfIn PDF document text
    • https://a1bd7baf-2de3-4c81-8914-4b74a732ecf9.filesusr.com/ugd/c89f15_49c748b0bc974a6c87247b5f8a8498a3.pdf?index=trueIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_dc018c9e51454ec5b46eb6c1c5327852.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_f3fc9382e2504dd1aaf79041ac4914dc.pdf?index=trueIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_8c11be91dd5b4325857ca2817a0772f6.pdf?index=trueIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001205e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205E 5580 bytes
SHA-256: aa40d8a6201ba2a2f95446a033ac0072b3e2c976e7d5172ed44d32c972c85282
font_01_sfnt_off0001333a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333A 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00013e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9E 10720 bytes
SHA-256: 6084322b334c98737cad2b7e8384831c21d9b330910842384a2525d771d59d6c
font_03_sfnt_off00016373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16373 11336 bytes
SHA-256: 73db0b5ba99f51cc44e3a3f08b0bde1326112fdfc8541111a61c0382a646cced

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