Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea62c27605e97d21…

MALICIOUS

PDF

91.7 KB Created: 2021-04-08 16:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b4d7b16ad7c640872d0a01696438ef9f SHA-1: ea4e373bd72b69ea7eefb673de3854af7df3b02f SHA-256: ea62c27605e97d21a44138ff776211c12b5e01cc5efa7e003d757df8c85d3e34
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The heuristic firings point to the document acting as a link farm, directing users to multiple external URLs, one of which is a known malicious domain. The presence of embedded URLs and the nature of the PDF structure suggest it's designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=watch+its+kind+of+a+funny+story+123+movies PDF link annotation
    • https://cdn.sqhk.co/navimoxa/f0ghjif/dexikov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465688/normal_6015c0ed7a943.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/3W66P4a/storylineonline_rainbow_fish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_5fd33c0deb1cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_605f919357b4e.pdfIn PDF document text
    • http://chtotakoeverti.biz/logitech_m325_unifying_softwareuupwg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_60662d405c228.pdfIn PDF document text
    • http://dfwshootersupply.com/simpson_pressure_washer_pump_repair_kitkqcns.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465000/normal_5ff6a03d30180.pdfIn PDF document text
    • http://jadebey-x.com/597165625435i04g.pdfIn PDF document text
    • http://paktum.pro/68343227718o3b2h.pdfIn PDF document text
    • http://asta-stroy.ru/xagagivipezugimebavikemuvhnwwp.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/iibXigJ/18841257582.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/lWUhgJo/turkce_pop_remix_sark_lar_2020_mp3_indir.pdfIn PDF document text
    • http://nikawixuvaxi.iblogger.org/mitaxedenugukoj.pdfIn PDF document text
    • http://tiziwosujo.22web.org/harry_potter_tough_quiz_buzzfeed.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/hDjaQia/sutiwetikesafa.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
    • http://lisokabosexipep.epizy.com/jorelikozubajudorokejep.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_6020d938a9b942fbbb44d15fdb55dbb3.pdf?index=trueIn PDF document text
    • http://panexomurubagu.epizy.com/how_many_flowers_in_the_attic_books_are_there.pdfIn PDF document text
    • http://savefativiluz.epizy.com/fosawepokopekow.pdfIn PDF document text
    • http://gunubaxerilol.epizy.com/apsacs_date_sheet_2019_class_6.pdfIn PDF document text
    • http://mejizemobimoli.epizy.com/synonyms_and_antonyms_of_all_words.pdfIn PDF document text
    • https://ce419959-236d-4487-89d7-67f356bda573.filesusr.com/ugd/147b51_ba18a457983c4b9bade6143bff5f1383.pdf?index=trueIn PDF document text
    • http://weketabafizevu.epizy.com/phenol-_chloroform_extraction_protocol.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_off00011951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11951 5696 bytes
SHA-256: 5685f3cb24e05bcf8bbfc3e37ee9de712e502d063e77f00f5054919f3226ea1c
font_01_sfnt_off00012c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8E 11376 bytes
SHA-256: 716a532d6ed557f39acb694a96bb56aac6a269ea35c6569ebafd6ac7f868cdff
font_02_sfnt_off000152ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152ED 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f