Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f978b689b2fea0…

MALICIOUS

PDF

81.8 KB Created: 2021-02-10 16:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 434143ed817a58dd4b03415e82e95394 SHA-1: 51564ecb2a8b1a74f5f6d68b68995079aae83cb5 SHA-256: 89f978b689b2fea0a4b979e15b8139d823903d497b217bee8a302a5cc560b2bf
134 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. It uses an urgency-based lure. 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/aws?utm_term=allstate+benefits+claim+form PDF link annotation
    • https://mixadawobavaw.weebly.com/uploads/1/3/5/9/135982386/xejitorowelejaxor.pdfIn PDF document text
    • http://gedawuxofawu.iblogger.org/blackmart_alpha_ad_free_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457311/normal_5fd03c14cca8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_5fdb170330e39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_600e597baced9.pdfIn PDF document text
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/0e3865a883f1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412894/normal_6003fe8a54fa8.pdfIn PDF document text
    • https://tonawonigavima.weebly.com/uploads/1/3/5/3/135345065/tekakomulirefiw_mewivobavoxan_numozaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_6020cfb678326.pdfIn PDF document text
    • http://joxopenizimili.iblogger.org/wifi_barcode_scanner_for_pc.pdfIn PDF document text
    • http://zawiferiga.22web.org/baldomero_lillo_sub_sole.pdfIn PDF document text
    • http://mivejuvididu.66ghz.com/pamalilaliko.pdfIn PDF document text
    • https://fimupekegu.weebly.com/uploads/1/3/4/5/134502303/sulukezanagobabevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nasakitubaribud.rf.gd/good_morning_photo_shayari_hd.pdfIn PDF document text
    • http://banitazivi.epizy.com/cambridge_examiners_reports.pdfIn PDF document text
    • http://wadogoded.epizy.com/best_king_size_sheets_2018.pdfIn PDF document text
    • http://woxanegerofokox.rf.gd/19580352846.pdfIn PDF document text
    • http://sogigadataga.epizy.com/171._excel_sheet_column_number.pdfIn PDF document text
    • http://xetobagog.rf.gd/la_casa_de_papel_episodes_guide.pdfIn PDF document text
    • http://finesegugumemo.epizy.com/emulateur_android_sur_pc_nox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61A 4944 bytes
SHA-256: c22ebdaa15431f17d78d977557b9e7a32db1ca474af2279354b9b480a48e91f8
font_01_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 10808 bytes
SHA-256: 334b7f25d9c9461858ac6ba41da114e7e2e69c9e59a1849c5d49aab540f7cfe9
font_02_sfnt_off00012b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B71 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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