Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcbe77aca41f385…

MALICIOUS

PDF

80.7 KB Created: 2021-04-16 19:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4dd3180193eed3de0bd904d57b4818e6 SHA-1: 24268e172dd3eccb9d620fb984192ee9c51e673d SHA-256: 2dcbe77aca41f3850402c42c35559f89f84e46083bacbc1980e1b196d38cfdb9
164 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 likely part of a link farm designed to obscure the true malicious intent. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan. The embedded URL and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to redirect users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=crew+release+form PDF link annotation
    • http://unosital.space/a_summer_lifeq989v.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/fuwal_mujag_suwajejibiva.pdfIn PDF document text
    • http://regvoolkim.website/basara_batch_sub_indo3lxco.pdfIn PDF document text
    • https://giloxegikejuzun.weebly.com/uploads/1/3/4/7/134712531/nofojelekiviguresozu.pdfIn PDF document text
    • http://ru-1.casa/nirozemazopiwoxadiwudotmb34d.pdfIn PDF document text
    • https://fokuxadeji.weebly.com/uploads/1/3/4/5/134585395/watavigorep_sagesosezosin_jokenewojekega_dibakuv.pdfIn PDF document text
    • http://defi-bet.world/20637007569pme2n.pdfIn PDF document text
    • https://mitebisaxu.weebly.com/uploads/1/3/5/3/135395238/d7348edb0a4da7.pdfIn PDF document text
    • http://vigastlens.xyz/669526123417r664.pdfIn PDF document text
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/muzinilavaviw_vebujoboda_polifuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jawikaginixuxuz.rf.gd/que_es_un_lider_concepto_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff006a62-8d00-4fd6-b09c-a254e9e1990a/korujarovisixekololene.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/lawiwamuwirojebamo.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/puviwapepalig.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/jetonulimiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e535369e-0721-45de-a6bd-35d942fd72cc/commercial_real_estate_finance_jobs_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63744008-4f2a-454b-9071-0ca7b71c2e2c/37306953778.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/ds3_all_endings_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/fimupejedizinavi.pdfIn PDF document text
    • http://xixujoteb.epizy.com/43198052749.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/what_is_your_sexuality_test_filter_instagram.pdfIn PDF document text
    • http://xapozemijemomoj.epizy.com/78606134623.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_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 4912 bytes
SHA-256: 4b572799b5028474aaee0127c0679e2c0ad9e4da6831a12fe27c9e9dc8297c42
font_01_sfnt_off0000f8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 11232 bytes
SHA-256: a907c732201a3def28b3f954552a7ee6ca41630f8b0708a9d9c11c4d70bbcf01
font_02_sfnt_off00011f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F22 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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