Malicious PDF — malware analysis report

Static analysis result for SHA-256 44395d91de1a8277…

MALICIOUS

PDF

88.3 KB Created: 2021-03-24 01:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 883b18b5f0dd0ab57eeffd099e0e073f SHA-1: 5327ce21d23003254b5bfdbc34d9ccc12c39b157 SHA-256: 44395d91de1a8277ebff9c32efb62c003582280eec44bb0075b07fc517857eb5
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://dugedepap.ru/wix?keyword=drastic+full+paid+apk+free+download PDF link annotation
    • http://xatovapotogu.mywebcommunity.org/biblical_theology_study_bible.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/how_to_make_formula_milk_for_infants.pdfIn PDF document text
    • https://moluzepin.weebly.com/uploads/1/3/1/8/131856103/3446902.pdfIn PDF document text
    • http://glawerry.online/george_foreman_grill_time_chicken_breastocjp8.pdfIn PDF document text
    • http://blekrossi.ru/26335008119u8xc5.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/firex_hardwired_smoke_detector_installation.pdfIn PDF document text
    • http://akmurzina.com/uppababy_vista_v2_stroller_without_bassinet5lp45.pdfIn PDF document text
    • http://fabermanufacture.ru/fluke_1507_megger_pricewgd7p.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/asfixia_perinatal_sociedad_espaola_de_pediatria.pdfIn PDF document text
    • http://kidiwutimako.mygamesonline.org/ver_los_juegos_del_hambre_3_castellano_online.pdfIn PDF document text
    • http://midekupe.22web.org/xojusesi.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/42740660954.pdfIn PDF document text
    • http://cabinetsly.xyz/using_ham_radio_without_a_licenselc69w.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/sekizosavuvug-powowes-tezewit.pdfIn PDF document text
    • http://nebatomefov.scienceontheweb.net/93462564833.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/1456023144.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fosofeba.rf.gd/the_land_of_stories_book_2_review.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_b2d79c09946240bca3fe2e4a8378c3b2.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_04920d3b3dd54e7ba73abff0238254a0.pdf?index=trueIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_11cbcf381145459a9b954e615021ffd5.pdf?index=trueIn PDF document text
    • http://nizulodezif.rf.gd/2595492563.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_05a449d4300a477b97f8db97242a6b6a.pdf?index=trueIn 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_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 5304 bytes
SHA-256: 8196045872a4d6852b840dbcba91f24d696f5c5d6f97dbc7161378116a49cbcc
font_01_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 11804 bytes
SHA-256: b9fd3158e6b2a4b2b0d5881921dcd2348b0bf63340de2134627f381bf5688797
font_02_sfnt_off00013e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7A 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073