Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa113acf38e5b0a7…

MALICIOUS

PDF

124.7 KB Created: 2021-04-04 12:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8171eee5c13c333d3d039a055a4f488e SHA-1: 12f82e12181b2875756350562c2fb386883ead62 SHA-256: fa113acf38e5b0a7587622f1f3a2d4a0b8fbea77aca15b928f43f01ae0893e62
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/award?keyword=awaken+the+giant+within+tony+robbins+free+pdf PDF link annotation
    • https://cdn.sqhk.co/sezogitov/Puieshh/fofumutexuge.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/SjhhcES/gyro_zeppeli_fidget_spinner.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/YhabOgj/wudekidafax.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/chhNjeR/jeniwisoruborarovebarul.pdfIn PDF document text
    • https://rodinesupogoj.weebly.com/uploads/1/3/1/3/131384539/junowotigomowip-porojub-nudovifabaxow-jasiwij.pdfIn PDF document text
    • https://cdn.sqhk.co/kabawamurelo/Ojimmif/journeys_interactive_series_hack.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/xupamu.pdfIn PDF document text
    • https://cdn.sqhk.co/wetotuluxe/fibSOid/ralutigexibaxanoke.pdfIn PDF document text
    • http://vejofewi.iblogger.org/free_able_resume_templates_for_microsoft_word.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/racyife/pixel_dungeon_tips.pdfIn PDF document text
    • https://zogowejodumuf.weebly.com/uploads/1/3/0/7/130775171/5d724.pdfIn PDF document text
    • https://xezixopizanew.weebly.com/uploads/1/3/5/3/135314636/b93a5.pdfIn PDF document text
    • https://cdn.sqhk.co/zeboxuze/YlZEm5I/50386909804.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/dBrJC6k/directv_app_login_error.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f802a6c0-5492-4cf6-bf4d-af7991311a97/20078983308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549c6c5a-10ca-4f9d-88b4-316618c1f253/what_is_50_liters_in_kg.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/how_to_prepare_phenol_chloroform_isoamyl_alcohol.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/shark_vac_then_steam_steamer_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/lugaf.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/remote_desktop_keyboard_shortcuts_not_working_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/34425893798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a884d0f4-4098-47ab-a5f4-14654a55bb0a/where_to_buy_thetford_toilet_chemicals.pdfIn PDF document text
    • http://serefelotu.epizy.com/solutions_manual_to_accompany_linear_programming_and_network_flows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33a0e2f-4343-430d-a74e-dceb82226ad0/philips_hf3520_turn_off_alarm.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_off0001ab16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB16 5660 bytes
SHA-256: b3aea1d56bbcde1c217807cec8d8f39c96ee8d3296c164d1a5b673b15827a1ce
font_01_sfnt_off0001be6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE6F 11720 bytes
SHA-256: c241f5ce96cfcdf64ae1246eb84859bdcd1eda1873e93b25c794824bc8bda92c