Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc8059ae5ad18f0…

MALICIOUS

PDF

88.7 KB Created: 2021-03-20 13:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 05c373653f9144f4d791d89b46653269 SHA-1: 690b20ebebfac09a82047b687f6729c6bd66d6cd SHA-256: fbc8059ae5ad18f0f2d0ee3d6d54f1d324b56a372a6a90583d132383b71a1dfb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected 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's part of a link farm or SEO spam campaign. The embedded URL `https://bologen.ru/wix?keyword=dead+target+hack+apk` further suggests a lure to potentially malicious content.

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 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://bologen.ru/wix?keyword=dead+target+hack+apk PDF link annotation
    • https://cdn.sqhk.co/xurazegoba/ibiisjh/famoxoje.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/bnDugi7/noticias_univision_34_atlanta_de_hoy.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/lTjdZKi/whatsapp_business_beta_tester_android.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/433320.pdfIn PDF document text
    • https://tidumexuxuzi.weebly.com/uploads/1/3/1/0/131071252/pumosefirusodemeju.pdfIn PDF document text
    • https://vijarijun.weebly.com/uploads/1/3/2/6/132695649/tidobuva.pdfIn PDF document text
    • https://nasipowo.weebly.com/uploads/1/3/1/3/131383467/naxupumevomilo-pusatilinabinev.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/ditosolos.pdfIn PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/rukozeligozeli-dimojuluf-tiwuxafogabu-kevasujezudo.pdfIn PDF document text
    • https://vakinora.weebly.com/uploads/1/3/1/8/131857586/degonew_bonebilopip_denisikijesora.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/7d60a967.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
    • https://uploads.strikinglycdn.com/files/61d29fe6-5e26-43fd-bd88-01a036c0a533/los_juegos_del_hambre_ver_pelicula_online_gratis_en_espaol.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_d9b2e65d6961490182e6c8fcaec67491.pdf?index=trueIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_5015f7b8025449f6b008f197f2cb824e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0f4df0-8c1e-458b-a009-0fa2aafe3fbb/how_to_measure_efficiency.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_14a8a9ddeb48444ea69a9aa8805718f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3488d87d-d0e6-48a6-8830-9272d0757506/how_to_test_wheelchair_battery_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1a308d5-6994-4579-80ab-7c2867e4f2bd/are_ilive_wireless_earbuds_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7539e74a-2fc2-4835-ac58-2473e8ab94e1/minidalosenativonid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3965b9fc-bd01-4f45-b59c-dad86ff852a9/marketbeat_best_penny_stocks.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_off0000ff32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF32 4712 bytes
SHA-256: b3da4b61e938bb7874ab950212c987bd0ae6308dd15b331dad5d6b5705763b62
font_01_sfnt_off00010f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4B 26920 bytes
SHA-256: eb857716ffeefe4756afc8632d3117295e7026417bd1e6eb285358fe0ed9aae2
font_02_sfnt_off000145ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145EE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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