Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c45d556a92a59b…

MALICIOUS

PDF

77.8 KB Created: 2021-04-07 15:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4fd5888c03c88869ebbb62f146aabd36 SHA-1: e78259e9d67730f9d33809aaca321b59febfd7e4 SHA-256: c2c45d556a92a59b3ed96670d6a7749c55e75efbdd0c6a4b32d0ba764ffe6d1b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as document titles or keywords, indicating a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates redirection to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://leonvi.ru/wix?keyword=ilife+v3s+pro+remote PDF link annotation
    • https://tonavibete.weebly.com/uploads/1/3/4/7/134748981/nejasubikawi-fefunamixobu-turof-narafedadavosuk.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/think_like_a_freak_chapter_3_summary.pdfIn PDF document text
    • https://wisufisuzok.weebly.com/uploads/1/3/1/3/131383924/8562937.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/xorometepodu.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/skitarii_codex_8th_edition.pdfIn PDF document text
    • https://lejonelawubuw.weebly.com/uploads/1/3/1/4/131453657/tupuzon-sixabazem-debupigaka-sumepozekoz.pdfIn PDF document text
    • https://guxitubekin.weebly.com/uploads/1/3/4/2/134267073/nokigolijumepixi.pdfIn PDF document text
    • https://wotuterivakevom.weebly.com/uploads/1/3/4/6/134608936/fe33c6bf.pdfIn PDF document text
    • https://zifofuxe.weebly.com/uploads/1/3/5/3/135386801/bimobapuxil_ponemorobasomi_rezupa_binaxuz.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/mazebelo.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/47311508605.pdfIn PDF document text
    • https://vovowiki.weebly.com/uploads/1/3/2/3/132303124/f039a77a8905.pdfIn PDF document text
    • https://fukenavu.weebly.com/uploads/1/3/0/8/130813663/kuridudivalim_lenitaz.pdfIn PDF document text
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/652354.pdfIn PDF document text
    • http://fojenuf.iblogger.org/fakakil.pdfIn PDF document text
    • http://busijizi.medianewsonline.com/foundations_of_mathematics_10_textbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/13186053487.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/bnz._co._nz_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/dujaxoxagijozokofozogav.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/pebudetareferibavid.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/how_to_calculate_gdp_per_capita_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/life_without_principle_thoreau_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/jiranadiwawolupajuwugaj.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_off0000f163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF163 5000 bytes
SHA-256: 77af3000b57593ab59a17d7764b766a50e33f2f17c5cc13bbaafdba53a97de99
font_01_sfnt_off00010260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10260 11152 bytes
SHA-256: 8bdb5e2a69acf35b64c53b607bad16719ac48e4cedaa7ee6fdd58a3e2c317074

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