Malicious PDF — malware analysis report

Static analysis result for SHA-256 47aa5997ba780a9f…

MALICIOUS

PDF

78.3 KB Created: 2021-03-29 19:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21e76f7396ff4aea4bf04d0cbf586034 SHA-1: 931a8cce831d98095efc18ee115843dffd8ca21d SHA-256: 47aa5997ba780a9fc658960a0cc15ef66d514708fc8ead423735419e6f7251de
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical PDF link farm detection and a ClamAV signature for Pdf.Phishing.Trojan. The presence of numerous external links, including one pointing to maypoin.ru, suggests an attempt to redirect users to potentially harmful content or phishing sites. While no scripts were explicitly extracted, the nature of the link farm and the phishing detection indicate a malicious intent to compromise users through external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=e46+m3+auto+to+manual+conversion
    • https://cdn.sqhk.co/xagaxubibiz/hMghphc/car_hill_game_download.pdf
    • https://cdn.sqhk.co/bulixanejad/rPriax8/kevinoles.pdf
    • https://cdn.sqhk.co/xojelumegasi/iibd4gg/date_format_pipe_angular_7.pdf
    • https://cdn.sqhk.co/tasaxasup/ic9CbKV/faby_bird_record.pdf
    • https://cdn.sqhk.co/dagorabowixu/ghatjjm/nudupifavosuxakapanisuxal.pdf
    • https://cdn.sqhk.co/pujixefan/qjehihB/cooking_mama_let_s_cook_all_recipes.pdf
    • https://cdn.sqhk.co/sevigexew/gcijgep/gevanaxiwojudeja.pdf
    • https://cdn.sqhk.co/gizoxemovefi/hfiager/baby_monitor_app_iphone_and_android.pdf
    • https://cdn.sqhk.co/dorodidur/hjxvjcf/miranda_kerr_home_line.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mukutud/cg_song_kaise_kare.pdf
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_7e030f3d7397468aa41b389de1ad782a.pdf?index=true
    • https://s3.amazonaws.com/wakuzidi/73070197645.pdf
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_d6eb4fe2c9eb44e7b5b721a914d74961.pdf?index=true
    • https://s3.amazonaws.com/zesotat/waxowubo.pdf
    • https://uploads.strikinglycdn.com/files/4533b26b-4b3f-4e34-a218-0bc689675e20/10884022679.pdf
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_628ef33796314a2db4c3d951d5b28b0f.pdf?index=true
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_c796017ddca84ce1853e78cef6e6fb10.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a586348f-54a9-4d0a-8f8e-74ad6c2225ae/32849374750.pdf
    • https://uploads.strikinglycdn.com/files/df743d0b-c0f2-4135-b400-c024d2923ab6/crochet_patterns_for_hat_and_scarf_sets.pdf
    • https://uploads.strikinglycdn.com/files/f7d11440-9775-4e67-9c08-30ee46b34f74/1200_calorie_diet_plan_to_lose_weight.pdf
    • https://s3.amazonaws.com/musokejixami/50365933598.pdf
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_962321d196be4ed789e24a41be7e2e75.pdf?index=true
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_a5e529c0cbf244b8925fcded74bb4faa.pdf?index=true
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_cba34efc10834f659765af0e941d4528.pdf?index=true
    • https://7692249a-17df-4225-ab6d-779169fb9a0a.filesusr.com/ugd/607883_df1ce8b8d279466899c3d0cbfd75b202.pdf?index=true
    • 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_off0000f426.bin
3dcfc02cd89a8abd6887b00e272fed0f46dd196dace4a2951473a41b6034494a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 5368 bytes
font_01_sfnt_off00010660.bin
836b5026ea899e54b29e2a504b50c1c0804ac121dd32aef426aeb5dab1e7adee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 10960 bytes

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