Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f109a9efc98917…

MALICIOUS

PDF

107.5 KB Created: 2021-05-19 14:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8bbb5d728870f1da784538f770eb5ef4 SHA-1: 085c495bd7880b4647e7407faff46717bee6f66a SHA-256: c4f109a9efc98917a9df72934d9842b79ba80f98071b7f8ceeff52a35d53771d
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The embedded URL `https://resalured.ru/strik?utm_term=mera+bhola+hai+bhandari+lyrics+download` further supports this, as it appears to be part of a SEO-based redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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 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://resalured.ru/strik?utm_term=mera+bhola+hai+bhandari+lyrics+download PDF link annotation
    • https://gosevitugelaw.weebly.com/uploads/1/3/4/4/134439416/migamutujix_wezox_muvate_tegegepizuv.pdfIn PDF document text
    • https://xoxajunun.weebly.com/uploads/1/3/4/3/134351876/samiremojuvaxaj-widazaku-betujapudagu.pdfIn PDF document text
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/jetagozoti.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/3343141d7dd.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/9ae6c05.pdfIn PDF document text
    • https://dagatofolake.weebly.com/uploads/1/3/0/8/130874029/gadona.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/366879.pdfIn PDF document text
    • https://fubagodesipura.weebly.com/uploads/1/3/4/3/134326772/lidibodejozeni.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/712857.pdfIn PDF document text
    • https://risibazizugati.weebly.com/uploads/1/3/4/7/134710005/4255895.pdfIn PDF document text
    • https://lupudeme.weebly.com/uploads/1/3/1/3/131378919/05dbaf9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b9bdd6-0ad8-4ad7-aeef-54c2389bfe84/wudozubabegobivegovipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49577c51-fa1f-46b9-b410-2794b3f3df10/47213350678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f736f834-0eba-42de-b0d3-a5b4beb4abcf/fate_system_toolkit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62a1221-156d-4c35-84a4-a5cf281d0b12/16578482301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7324e747-ebdc-4751-a589-29bce2583bea/how_to_use_afterglow_xbox_one_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46be3c74-551c-4c8d-ae8b-d785a746a625/rebijanififo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30928b57-fab0-407b-bf0a-c1ef14b36042/sword_art_online_1_aincrad_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa88f0cf-8dfe-4a42-ab25-ce197a852078/53567107630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0592289-365b-4dac-9add-5ebd7fdaa106/falelalejulun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05822d51-c30e-4de5-bd7f-b77976e0bdaa/polefar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf535ca0-16cd-43f0-9bb3-9d71130b5f7d/2006_honda_civic_hybrid_repair_manual.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 5368 bytes
SHA-256: 7ab71e5d077989093ee890a669592cac2ceb26d98862269ec189ba9f334a1ab2
font_01_sfnt_off0001187a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187A 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off000123d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D7 11660 bytes
SHA-256: 7cb0f11988213c354fe2bde8901d5b700d301ef1bff678491e3aa2d0c5403cba
font_03_sfnt_off0001450e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1450E 11348 bytes
SHA-256: d2672a36dc50f9dce5bccf882b582bfa10465a6457a48e1e74de8b6101146e5a
font_04_sfnt_off00016c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C0D 16516 bytes
SHA-256: e07a26069ab1ac13a0253cf1bca44563250d7c91551f21e9f71af9fe2f2e31e5
font_05_sfnt_off000182ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182AC 8432 bytes
SHA-256: 6d2b292f63d78ec8b0c1db71347284e536a681b69e8613df1a253675b605d26b

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