Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a300b1518648378…

MALICIOUS

PDF

71.5 KB Created: 2021-03-02 16:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e0ac59920df74f022555b5829fc7da7b SHA-1: d8a327fd2f073ebe0e3d061a4edcb8508406bd83 SHA-256: 9a300b1518648378103ccf1d1148cce8943daa04a93dc1dc38359f85c0c7e870
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of numerous external links suggests an attempt to direct users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=langston+hughes+i+too+sing+america+poem+analysis PDF link annotation
    • http://delinapod.mypressonline.com/wekogobime.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/vosadonulojotuzozuzo.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/towelojopunaxoxupiwi.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/pitixuvixakitobewagaf.pdfIn PDF document text
    • https://zuzilumapodebaj.weebly.com/uploads/1/3/1/3/131382406/kekojawesitu_sadileto_pizokexudat_zofimofovikuvid.pdfIn PDF document text
    • https://gefizubumob.weebly.com/uploads/1/3/4/4/134473977/8989516.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/5642553.pdfIn PDF document text
    • https://subegawi.weebly.com/uploads/1/3/5/3/135394411/ccac5837469.pdfIn PDF document text
    • https://kojozoxilasa.weebly.com/uploads/1/3/5/3/135302893/wobozudib-kebum-nuzutewakog-sototozeb.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/rii_i8_touchpad_not_working.pdfIn PDF document text
    • https://wirevoge.weebly.com/uploads/1/3/1/8/131856771/d470d7e32.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/netgear_n600_router_reset_password.pdfIn PDF document text
    • https://xoxizanelanoruf.weebly.com/uploads/1/3/0/7/130740612/wapidu-pipofodatevebig.pdfIn PDF document text
    • https://semukozev.weebly.com/uploads/1/3/4/4/134493414/roneziwebakogufoj.pdfIn PDF document text
    • https://diwolusetu.weebly.com/uploads/1/3/5/2/135299278/7584116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakinopelijanup.rf.gd/android_google_play_console.pdfIn PDF document text
    • http://ketened.rf.gd/cavetown_this_is_home_piano_sheet_music.pdfIn PDF document text
    • http://wiwolobeduju.rf.gd/how_do_you_reset_a_fossil_chronograph_watch.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/resumen_del_video_el_poder_de_una_vision_joel_barker.pdfIn PDF document text
    • http://gaditimotef.rf.gd/64216178754.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_off0000db60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 5392 bytes
SHA-256: bce7b6e07d710ba8deabd5849d99f641e5ea20d7a6508577d070eb198f3b23d2
font_01_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 10328 bytes
SHA-256: 4f4429f9d745b57692cee1e410ed180fcc63bccd1848d4147f76e72e78b545bb