Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e47358bce4b35c6…

MALICIOUS

PDF

76.8 KB Created: 2021-03-12 05:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 563752023d891c252191a9da83e3d7f0 SHA-1: 5a52ca2191cd36eaa30bb8e21bcd23697cdfd5ce SHA-256: 5e47358bce4b35c6235d7dd9d41a8b2e4a2f3cdb7753350aefff339110f6e406
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://dafemum.ru/wix?keyword=theme+hotel+3+y8 PDF link annotation
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/vuzetu_rewugeboz_vibowuxokolet_fuzupapawul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_603e0b71e7536.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/hbyephb/monster_killing_city_shooting_iii_trigger_striker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407793/normal_60012065f0973.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/hcFlhb9/dojigufajiza.pdfIn PDF document text
    • https://xefapakofaguwa.weebly.com/uploads/1/3/1/1/131164324/46d196a011e1d.pdfIn PDF document text
    • https://difidewuwigexej.weebly.com/uploads/1/3/4/6/134652805/vituf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_6018448f15791.pdfIn PDF document text
    • https://kusipujetaz.weebly.com/uploads/1/3/4/4/134462876/c70b9bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485927/normal_602035991857f.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/gfheSge/burger_king_locations_cleveland_ohio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387713/normal_5ffdba3cb855d.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/latin_bass_book_oscar_stagnaro.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/48979402686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457577/normal_604adfec4845a.pdfIn PDF document text
    • https://cdn.sqhk.co/segexiji/e8xXhcJ/4260740626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407306/normal_5fc9156ecd6c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/falevi/95083770657.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/george_bridgman_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/aruba_2530-_24g_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/broadcasting_media_information.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/adept_verb_forms.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010050.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10050 21488 bytes
SHA-256: 0903944fd0034922ebe89c4c713b9813f4ac8f3e380f9b12c0a46404839a0939
font_00_sfnt_off0000cca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA3 4852 bytes
SHA-256: 728b182401ff76472804350765aa65992bf48674f72d498dcc593fd9074ed316
font_01_sfnt_off0000dd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0E 10260 bytes
SHA-256: 410848f59ab98271470efffee6661bcd7874bd0b72866b81a9429448d616e4b3

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