Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48f016de8f93ab1…

MALICIOUS

PDF

69.6 KB Created: 2021-02-21 14:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 847544fff111a04efa43952a18827fbb SHA-1: 9700b5c784d7f34f668d0d69d4cc11205edbd955 SHA-256: c48f016de8f93ab16f907474c2924d5ca3eeb0746efa8cff2da4d2bbd9fa2e62
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=total+quality+management+strategy+examples PDF link annotation
    • http://letxxnx.org/spanish_academy_soccer_coachinggkrgf.pdfIn PDF document text
    • http://load-bcp.com/ielts_listening_sample_testsxmnv.pdfIn PDF document text
    • http://mon-cmso.best/99017648290cirkm.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/1848357.pdfIn PDF document text
    • http://svoylend.xyz/parental_agreement_template_ontariohmh42.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/xewaxopubali.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/divojomepunajaxenu.pdfIn PDF document text
    • https://dinuboxisoxim.weebly.com/uploads/1/3/1/8/131857966/puloxi-zanojofer.pdfIn PDF document text
    • http://winnerslm.space/22766436854zzzqy.pdfIn PDF document text
    • http://copyrightprivacy.site/66393142302o9i6n.pdfIn PDF document text
    • http://winclean-shop.space/3d_harmonic_oscillatorl1v7c.pdfIn PDF document text
    • https://bofakodejo.weebly.com/uploads/1/3/4/2/134265658/ef3a622.pdfIn PDF document text
    • https://xexonukomamub.weebly.com/uploads/1/3/4/3/134353621/sogitem.pdfIn PDF document text
    • http://submonster.xyz/lojofudetojovd4am.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/jiguwuzobozobaz/appendicitis_rch_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/urine_cytology_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/anil_kapoor_judaai_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/dazasavosofanoga.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/pudejugulebasitasita.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/wevakefesotobosusejuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/cintas_uniform_embroidery.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/64178991623.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_off0000d507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD507 5384 bytes
SHA-256: 58f605e8412f99ffc94ac3ebaea1e5f56002c9a691dee08e97e586641a0002ab
font_01_sfnt_off0000e752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE752 9968 bytes
SHA-256: 2b44ac1b6bf24de4951ba9346b64b3c86299ec0b51f5d409316d6fc1e5b45566

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