Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0e6bf3d517bd1c…

MALICIOUS

PDF

71.6 KB Created: 2021-03-23 04:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0ebad12220bbc26c756e360e00e3d26a SHA-1: 22ca477d50dacdc4390291693980861b76822bfe SHA-256: 3d0e6bf3d517bd1c07c4299b41b978ed608c383ea51292991c705923fb3f86f8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of external URIs suggests the document's primary purpose is to redirect the user to potentially harmful content.

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 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://xezojetit.ru/strik?utm_term=schwinn+airdyne+pro+parts PDF link annotation
    • http://xoxosedefoxadu.mygamesonline.org/53758376185.pdfIn PDF document text
    • http://lazadacostumercenter.com/hollywood_reporter_most_trusted_news_anchorsrxvsl.pdfIn PDF document text
    • http://neojust.ru/74043947287nyvtu.pdfIn PDF document text
    • http://koreatop.ru/how_to_rig_for_catfishu3p54.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/sonoxofofiralo.pdfIn PDF document text
    • http://petersikdar.com/xotosejigirolujanatave8mluw.pdfIn PDF document text
    • http://wikatugakuvifi.iblogger.org/us_citizenship_test_2019_one_answer.pdfIn PDF document text
    • http://znohist.site/acrylic_sheet_for_laser_cutterf985h.pdfIn PDF document text
    • http://cetapp.xyz/maze_runner_4k_downloadz8d3s.pdfIn PDF document text
    • http://kenufapozij.22web.org/castellano_o_espaol.pdfIn PDF document text
    • http://lumacy.site/8071382412101o0u.pdfIn PDF document text
    • http://gdztut.com/new_animation_movies_2018_freeyfexa.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/kinefaripidixulofumekib.pdfIn PDF document text
    • http://uplrezina.site/car_selling_contracttrwqd.pdfIn PDF document text
    • http://mscredit.info/valopalewuvaxa3mm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexekuduwowig.atwebpages.com/speak_softly_love_score.pdfIn PDF document text
    • http://jozafijudibedak.epizy.com/kipaditilojepinekileregon.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/83447415581.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/examples_of_probability_in_statistics.pdfIn PDF document text
    • http://pulijivugis.epizy.com/45883073244.pdfIn PDF document text
    • http://jupefavasareje.rf.gd/what_are_4_types_of_authors_purpose.pdfIn PDF document text
    • http://wowifimeziv.rf.gd/binance_app_for_iphone.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_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 5424 bytes
SHA-256: ff7a37182d532d3fb683b68f9741a28bb53caf3d444a4704c7277440a84cd6d8
font_01_sfnt_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 10740 bytes
SHA-256: de377532e4644cab52fa30cdbe3d8dbb666a98e7e700015c1c2f4684f1deeeae

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