Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d49a524daa3aa97…

MALICIOUS

PDF

75.2 KB Created: 2021-03-28 18:34:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae02da0d06256c1f0258af281572c15 SHA-1: 5b5d36272091382bb243f28c6fbd8c7b0a739ef1 SHA-256: 1d49a524daa3aa97e6931dfe7218bcbe2c69590cc99a01e769d4c5d2f5e82a57
156 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 point to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=edgenuity+spanish+2+midterm+answers
    • https://cdn.sqhk.co/lilaxikixo/zwgidCw/wordpress_admin_login_url.pdf
    • http://rozefuzapotor.iblogger.org/guide_boitier_fibre_orange.pdf
    • https://cdn.sqhk.co/nolagutotato/diTTiaM/31223938551.pdf
    • https://cdn.sqhk.co/dewufidabo/igMFrgj/modern_age_smoke_shop_athens.pdf
    • https://cdn.sqhk.co/mitejapeki/jNPiiic/fikigewepop.pdf
    • https://cdn.sqhk.co/wepiwojeta/Wigjdjc/dc_superhero_creator_game.pdf
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/aaba11adf1281ba.pdf
    • https://cdn.sqhk.co/rixutixim/0RSgdhg/usc_duo_mobile_setup.pdf
    • https://cdn.sqhk.co/foropogajag/PBQifjf/69245880936.pdf
    • https://cdn.sqhk.co/kobewudojuvo/gSasAgh/united_airlines_plus_points_upgrade.pdf
    • https://kepinofex.weebly.com/uploads/1/3/4/0/134017679/gumelekevodisef.pdf
    • https://cdn.sqhk.co/xeloxilava/Jiir8Ir/simple_classical_piano_pieces_to_learn.pdf
    • https://cdn.sqhk.co/sabumijobude/bZhdafw/monster_craft_kindergarten.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jejulurowev/fundamentals_of_industrial_hygiene_online_course.pdf
    • http://komosonira.rf.gd/sudiba.pdf
    • http://vofovesotidogi.epizy.com/odd_thomas_dean_koontz.pdf
    • https://s3.amazonaws.com/podawakumepewez/brotherhood_mutual_forms.pdf
    • https://s3.amazonaws.com/wumodukubaru/botazoz.pdf
    • https://s3.amazonaws.com/kumasala/38672952819.pdf
    • https://s3.amazonaws.com/teximikamukubo/rixexakepegubowetinibok.pdf
    • https://s3.amazonaws.com/jadere/movie_s_sites_for_mobile.pdf
    • https://s3.amazonaws.com/popilo/sheet_metal_ductwork_fittings.pdf
    • https://s3.amazonaws.com/sebunuzu/47354075167.pdf
    • https://s3.amazonaws.com/lowebemuwojiso/lavender_town_piano_easy_sheet_music.pdf
    • http://lowazuxakosilal.epizy.com/heart_card_game_free_for_mobile.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e308.bin
5d3bef66c840220a94c4b3705ed17c8007263933858eb781a5d5e652a03ef5b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE308 5624 bytes
font_01_sfnt_off0000f621.bin
6a7ce113e63cea34cda75f25f97954ae1d334717b2e2ba7aa11f357e4bf656f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF621 12280 bytes

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