Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe7ae244f359f91…

MALICIOUS

PDF

80.6 KB Created: 2021-06-12 13:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 36e8f9cdecec217a7b101b2e65624ae7 SHA-1: 8536d1b7d181602df640d9f96fa9dd06d84240e7 SHA-256: 3fe7ae244f359f91293ef709f68292c260b7a1494cde2be3a0c3d1b74bb15fbb
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a 'download' button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://puwikopigab.weebly.com/uploads/1/3/1/1/131163601/voxovatilibo-givufi.pdf In PDF document text
    • https://dovejopizodumu.weebly.com/uploads/1/3/4/8/134883147/8119081.pdfIn PDF document text
    • https://fanuwatesovize.weebly.com/uploads/1/3/1/3/131380837/vokegozigiraw_getubetefuzanaf_temepisutope_gebele.pdfIn PDF document text
    • https://tonesokesimo.weebly.com/uploads/1/3/4/7/134757712/lutetizapagej.pdfIn PDF document text
    • https://roresino.weebly.com/uploads/1/3/4/3/134364893/lipukokaluwilo_vogugatenazo_diwuzoviwasix_zazaminafekifel.pdfIn PDF document text
    • https://rawewarox.weebly.com/uploads/1/3/1/3/131379085/2861074.pdfIn PDF document text
    • https://kavakisin.weebly.com/uploads/1/3/0/9/130969045/tiniruwobuv_fujevapotitojot_noxefobaranovi_sojenanen.pdfIn PDF document text
    • https://felevigapoboxoj.weebly.com/uploads/1/3/5/2/135299972/jiwivep-weronotem.pdfIn PDF document text
    • https://wijimoki.weebly.com/uploads/1/3/4/4/134485243/6454948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/sq/ugae/~3/UZrB20b2Dcg/square?utm_term=pradeep+chemistry+class+12+volume+1+pdf+downloadPDF link annotation
    • http://kavuruxu.pbworks.com/f/gebawapejexezogofokesutol.pdfIn PDF document text
    • http://bavudexote.pbworks.com/w/file/fetch/144667608/whirlpool_dual_ice_maker_french_door.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1f5c8c-bd9c-49c7-838f-d9b2dfc5cc43/does_the_motorola_e6_have_wifi_calling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886d9600-caab-4dca-9be7-25b5684150e9/soxibed.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/how_to_program_an_orbit_2-outlet_hose_faucet_timer.pdfIn PDF document text
    • http://pezaloribed.pbworks.com/f/olivier_blanchard_macroeconoma_7ma_edicin_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/189bc18e-0978-43a5-99b3-6956e180cb2e/47330888061.pdfIn PDF document text
    • http://sejuworepow.pbworks.com/w/file/fetch/144418665/58265098320.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
    • 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_off0000e565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE565 5832 bytes
SHA-256: 28b62e27d48a7fe0d71367005a008e531412c7475e011447aa05fdec69b1baa2
font_01_sfnt_off0000f937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF937 11044 bytes
SHA-256: e784680bca24e9e4e2d82677b6e7402c847c70ad34ff6748f9a0076df1346155
font_02_sfnt_off00011f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F01 16364 bytes
SHA-256: de5c7ed3f16be387c0962559da2342044f09b04d2ca5c65987e2e5d33df107e6