Malicious PDF — malware analysis report

Static analysis result for SHA-256 6283b1170c522b1d…

MALICIOUS

PDF

93.8 KB Created: 2021-03-09 17:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d3ed17299d244adee64879f81b4523f4 SHA-1: 59fc2c03753d6c3e4a1be11ebae3abcb5d56bd7f SHA-256: 6283b1170c522b1da4c0804fa65b9014a46cc8a1e90b1e2b527b02e6f739c2fb
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/award?keyword=real+reactive+and+apparent+power+pdf PDF link annotation
    • https://wozogerodinanu.weebly.com/uploads/1/3/4/4/134498855/449735.pdfIn PDF document text
    • https://regutipedazuvi.weebly.com/uploads/1/3/1/0/131071249/ripexegeg.pdfIn PDF document text
    • http://erogancolumbia.site/creating_shared_value_the_one-trick_pony_approachcb2bi.pdfIn PDF document text
    • http://nunopasatipimav.medianewsonline.com/xiwipozadaxuviruzut.pdfIn PDF document text
    • http://sacredname.ru/free_beautiful_wallpapers_for_mobileq8q2f.pdfIn PDF document text
    • https://nimubawelekuf.weebly.com/uploads/1/3/4/2/134265751/a62ee69db3491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5fd3127ac3e7f.pdfIn PDF document text
    • http://itasda.online/suvinenuzomukujixawovpvsvr.pdfIn PDF document text
    • https://zosonokabawim.weebly.com/uploads/1/3/4/3/134316026/1772713.pdfIn PDF document text
    • http://allieshouseofhope.com/gegekupamaruc5jfy.pdfIn PDF document text
    • http://sobakin.space/dead_effect_2_vr_walkthrough2qn8p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479917/normal_5fe4e88968a86.pdfIn PDF document text
    • https://xedutorapul.weebly.com/uploads/1/3/0/8/130813372/0b194.pdfIn PDF document text
    • http://alteramaks.world/246584244092os5i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_6013af1d60da7.pdfIn PDF document text
    • http://aycotoro0.xyz/4798875005209oro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473892/normal_60004cbf5f731.pdfIn PDF document text
    • http://grandov.pro/how_to_set_howard_miller_grandfather_clock18coh.pdfIn PDF document text
    • http://bufo.online/celestial_seasonings_bouldernsccx.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/yamaha_rx_v673_audio_return_channel.pdfIn PDF document text
    • http://mkr-olimp.info/pululonuwebi4he5u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_601532f81639e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_e22f9be17c6e41ce93ae9280de107b58.pdf?index=trueIn PDF document text
    • http://kivozusemu.atwebpages.com/6249555652.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_bc28cc7e70464ee0a72353c89f381cb9.pdf?index=trueIn PDF document text
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_ddc18a1fd7294dfc9bfa24e3eb5ca9ee.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDE 5128 bytes
SHA-256: 10ff0e6970da176d97ffad46dca503a026ce3aa1a182e90e162d9c4bfd474ab9
font_01_sfnt_off00012d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D80 11144 bytes
SHA-256: 6ecf6fc57d0c60bca894a16c37c15a2f13c76810723c590aa1d2e218ba0e1b53
font_02_sfnt_off000153d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153D7 16184 bytes
SHA-256: f984f7a7abe4e4a3001fff82eb05d2476a3f79f48e9366051d012d9d6892f89d