Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd128b3ed0c082a4…

MALICIOUS

PDF

92.8 KB Created: 2021-03-12 20:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9aba72247fdb2b4a3cda2f9a0220a26a SHA-1: 562a6787bf737736c3acfee71719af43bcb3bbe8 SHA-256: dd128b3ed0c082a49e6119762aa38fa345bd278cdedc2fa0b0d1c4e9aff37b45
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 0.9992

Heuristics 5

  • 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.
  • 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://seumenha.ru/wix?keyword=partial+fractions+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388405/normal_6019b5236ca56.pdfIn PDF document text
    • https://sowubibuf.weebly.com/uploads/1/3/4/3/134308786/736169cf235.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/heidZ7W/mini_craft_new_world_craft_2020.pdfIn PDF document text
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/d3b53db2b9a31d.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/nokuposaxujofa-gisomavogifi-bodanukimer.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/basic_calligraphy_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464732/normal_5feebf1ebfe82.pdfIn PDF document text
    • https://cdn.sqhk.co/gixobujikelu/ieiejgZ/fofekatoxo.pdfIn PDF document text
    • http://swiss-gear-top.xyz/does_jumping_jacks_burn_calorieswyf3c.pdfIn PDF document text
    • http://zhigina.ru/59634080404l2y03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_5fd34e6dacb6c.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/iaZAii2/ulysse_speedometer_pro_1._9._91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5fdc14bfed6e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_5fe73454ee496.pdfIn PDF document text
    • https://dazuneluxenewag.weebly.com/uploads/1/3/4/3/134316856/vusizagatisap_muforudafoxo_goladatusa_lopozawazij.pdfIn PDF document text
    • http://biomaniix.website/android_chat_application_using_xmpp89sn1.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/34862852586.pdfIn PDF document text
    • http://kafujaguvo.mygamesonline.org/33745910100.pdfIn PDF document text
    • http://lady-bug.club/tisumazidabapair28u.pdfIn PDF document text
    • https://cdn.sqhk.co/febapaji/ifOjieK/7670552319.pdfIn PDF document text
    • https://zojopufowe.weebly.com/uploads/1/3/4/5/134523349/litimadamabopit.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/a365bb2d-e51b-4837-9d7b-5222ff5935e4/27028470258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6344cd60-c2a3-417f-9d7d-beab1cb0e311/ashton_woods_apartments_cary_nc_27511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af2f740f-a562-4e91-8fdb-0f9dab8d1838/new_moon_book_cover_hd.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/will_grayson_will_grayson.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_off00012468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12468 5124 bytes
SHA-256: a00680c42848e0f19db2502aff8220466624a89f4578d0d28f36193719799df2
font_01_sfnt_off000135e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E4 15484 bytes
SHA-256: 1f205c9a774aaa2f4c8da9702b2a52f7051533ab6b2dc321204c46e5430da7c6

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