Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcfacebc43b7201…

MALICIOUS

PDF

83.1 KB Created: 2021-03-15 12:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1f7696ab8dd56315e9ba3eb485364979 SHA-1: 608670988286b5947eb20938bf49aef85612f581 SHA-256: fdcfacebc43b720191f93e924779154b01064d51a5aa4cc85462a404352df5e1
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that likely lead to further malicious content or phishing sites. The presence of multiple external links, some hosted on disposable domains, suggests an attempt to manipulate search engine results or distribute malware indirectly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/award?keyword=word+to+pdf+converter+app+free+download+online PDF link annotation
    • https://cdn.sqhk.co/letijefa/cggNji7/wildcraft_animal_sim_online_3d_play_free.pdfIn PDF document text
    • https://bolumuratojepo.weebly.com/uploads/1/3/4/7/134749128/fawagonenefosejowudi.pdfIn PDF document text
    • http://gidonuvawugirid.medianewsonline.com/magic_tree_house_merlin_missions_books_1-25.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/921gcif/world_cup_2018_results_brazil.pdfIn PDF document text
    • http://bumalutaf.iblogger.org/18198119657.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/rinavafodede.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/iifjjhc/karaoke_app_offline_free_download.pdfIn PDF document text
    • https://kotimujisozun.weebly.com/uploads/1/3/4/8/134880640/nomavovowidapip-xubukakapudute-pewufi-fojefugerudaduw.pdfIn PDF document text
    • https://bolegabafewibe.weebly.com/uploads/1/3/4/6/134651697/timif.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/jufug.pdfIn PDF document text
    • https://lopifonexebifi.weebly.com/uploads/1/3/5/9/135986218/7194039.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/20063751738.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/7694326.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xobofob.rf.gd/blomberg_heat_pump_dryer_manual.pdfIn PDF document text
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_75234d4030d6473a93e0a51086013fde.pdf?index=trueIn PDF document text
    • http://sedobuxekazadi.rf.gd/free_black_boss_baby_invitation_template.pdfIn PDF document text
    • http://vetisuduxujin.epizy.com/tokesolimu.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_7154cbdf0de04fc28be64cf03affcdab.pdf?index=trueIn PDF document text
    • http://namepafubi.atwebpages.com/sosiniwebiniluvimejabug.pdfIn PDF document text
    • http://gifidabula.atwebpages.com/arabic_bangla_dictionary.pdfIn PDF document text
    • http://nogomazarem.epizy.com/guide_dragon_age_inquisition.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_off0000f5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E2 4992 bytes
SHA-256: adc3c7da13ca6fdc72c738ffe2b7d26fb18d4c147b663576119707b62f13bbf4
font_01_sfnt_off00010723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10723 5136 bytes
SHA-256: 502a4d7faad2080bc3424903855a26b110933a8cd9dc934df2121d696ed07163
font_02_sfnt_off000118ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CE 10912 bytes
SHA-256: 73a8e9cfea8c9c33482ea2e45ef5bb6e3813ac851cec2380d6af64c940c9d22a