Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d30b6afa7c5c383…

MALICIOUS

PDF

74.9 KB Created: 2021-05-06 05:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: edbfd017140affa9fafc7f90074ee5c5 SHA-1: b2330fe904d93412b0887690b8472a5b6052894d SHA-256: 5d30b6afa7c5c3833f9482fbdd1deca7777aee9b51a1e33c5aa55c1a941b3a20
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://xajibur.ru/strik?utm_term=tipos+de+sistemas+de+informacion+empresarial+ejemplos PDF link annotation
    • http://vipadminler.org/harry_potter_book_1_chapter_4_summary1mdtd.pdfIn PDF document text
    • http://resimpub.com/menoviwujalizu3v8to.pdfIn PDF document text
    • http://opt15.ru/26039051475kf6a6.pdfIn PDF document text
    • http://stroy-level.ru/old_yeller_song_lyrics_jojiqg821.pdfIn PDF document text
    • http://rozel.ru/rolopoubo1t.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/eibPTOF/19745111486.pdfIn PDF document text
    • http://fruitslope.online/how_to_code_comcast_remotebsk7f.pdfIn PDF document text
    • http://blue-tick-central.com/petsafe_collar_stopped_working1l41c.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/84595871910.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/hdw5K8a/tetopemulixezun.pdfIn PDF document text
    • http://faceit.su/sulodawizoxunejelav366qe.pdfIn PDF document text
    • http://dommasters.site/alphabet_mobile_wallpaper_freefcyys.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/fooihpC/54687780434.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/dreamweaver_tutorial_for_beginners.pdfIn PDF document text
    • http://wiregabjuk.fun/bearded_dragon_names_for_malefod6a.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/ijkpjai/67231241003.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mulerux/turn_off_news_feed_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/wejegogamijonerisigamodi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/50825047466.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA89 5116 bytes
SHA-256: 868aa519925152653bc6237b64477409fbd554793922a3995a7a41f9f84b4240
font_01_sfnt_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 11088 bytes
SHA-256: d9bd467e3d2086e49a67b09b491029e952b2c2827e49c7c00c4a328fff3351b4
font_02_sfnt_off00010ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.