Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd167f5d016b71f…

MALICIOUS

PDF

78.9 KB Created: 2021-02-20 04:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7b512aad554c5819774af53f0367a263 SHA-1: 29a5bd4023b7f6d7e40f7ce625dfc75aca940a5f SHA-256: 5dd167f5d016b71f2eafe12ea01c1ae1a0b2887c0c46892c8d8a41dfd8a4cdb7
164 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 0.9998

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.
  • 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://baarspo.ru/strik?utm_term=rpg+maker+vx+ace+rtp+not+installed PDF link annotation
    • https://kilazazemuvazu.weebly.com/uploads/1/3/1/4/131452741/zizeju_nokarakegixova_kukeletapur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_5ff04bf07bdcf.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/eibdjiU/41012523530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_6019690d4eb34.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/rakul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456369/normal_5fdec7f0e0144.pdfIn PDF document text
    • https://cdn.sqhk.co/lekaguko/FHMheje/retro_games_emulator_android.pdfIn PDF document text
    • https://dazuzidasepod.weebly.com/uploads/1/3/2/6/132681566/pisatim_savijapowexuv_rumebupaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369330/normal_5fc9948500b51.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/ghlhfie/fc_bayern_munich_old_stadium.pdfIn PDF document text
    • http://bikafufevijekep.iblogger.org/best_buy_garmin_vivofit_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485313/normal_5ff2df2b1e458.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/pibajuwi/punctuation_guide_ellipsis.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/14066933409.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/talking_cat_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/naruto_shippuden_kizuna_drive_ppsspp_android.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_off0000f579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF579 5592 bytes
SHA-256: 59cbaf1c4755bdd88159bf275543493fe4471e6f8c37aacc259cf4da2c1fef16
font_01_sfnt_off00010878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10878 11128 bytes
SHA-256: 2f0577daa8268bf6b69bd366ba88f1273c9c81a9e7fa8faeb1aba3b6751d938d