Malicious PDF — malware analysis report

Static analysis result for SHA-256 050fcec676581d9c…

MALICIOUS

PDF

100.2 KB Created: 2021-04-05 02:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6fc0bf7d6780cdddd0d87ebe8bcd37d9 SHA-1: 1d19b9ec7d7b3c4948b56f37a73e703cf45624a1 SHA-256: 050fcec676581d9c79f6e6858f2de78bd95df1ddb5c33a2c324a2c25aa980954
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://baarspo.ru/123?utm_term=aiims+raipur+result+2019+answer+key PDF link annotation
    • http://xisumagogali.getenjoyment.net/tusoruv.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/ediiEhe/tower_duel_coupon_code.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/hghjcii/re_monster_evolution_tree.pdfIn PDF document text
    • https://cdn.sqhk.co/modurasisuwu/iigjfgd/ben_10_coloring_book_online.pdfIn PDF document text
    • https://cdn.sqhk.co/remozemot/gQgdijv/fipukopoxuwup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467306/normal_5ff1eb22b2ba8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_600d2cf2f3254.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/ij3Xic1/putixofipodegire.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/bQijial/switch_pro_launch_date.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/ehdVi2O/wamidafizewitoxunokuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453532/normal_6014345dd6e31.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/gdMifgi/84812602237.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/600_shekels_in_the_bible.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/xesiderebapavavimufifox.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/cOn41ii/cnc_milling_machines_for_sale_australia.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/zunewidimem/still_i_rise_sheet_music_yolanda_adams.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_e5c8e13443c04fcc9e574920d138164f.pdf?index=trueIn PDF document text
    • http://badamowafe.onlinewebshop.net/primal_power_method.pdfIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_274a2323bbf8477786c49b3bf767abc5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/getizar/green_screen_explosion_with_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/32594227387.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_off00014a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A00 5692 bytes
SHA-256: 8d7b82315b96473727483cea65867cfc8d60a939bb2674f24f2864749e099064
font_01_sfnt_off00015d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D66 11188 bytes
SHA-256: 10963ad20f2ef683d5f0495b5f8f903be2de98b9a6ac61eeb7b01876eca9d4ea

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