Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2adb97b7fc3494…

MALICIOUS

PDF

83.4 KB Created: 2021-03-18 05:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 59f9b3f29e139de58006298c6754f985 SHA-1: b998628f4a77240c18e1e013891ca7f78a0d8c3a SHA-256: 4a2adb97b7fc34944275852bb4dbb3a3d4df623715c26998d9e5e22c986d2106
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 0.9961

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://lozipotod.ru/123?utm_term=madagascar+movie++filmyzilla PDF link annotation
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/lonawizo.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/cvgehdL/64436783705.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/55730128666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5fd990f318702.pdfIn PDF document text
    • https://cdn.sqhk.co/xovenekot/c3wibge/personal_loan_agreement_template.pdfIn PDF document text
    • https://cdn.sqhk.co/xukigipeduve/QYgxCjd/40043322727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417406/normal_601d72595b1b1.pdfIn PDF document text
    • http://besuxiju.22web.org/85542877281.pdfIn PDF document text
    • https://gororumemi.weebly.com/uploads/1/3/4/5/134517819/41b6f25a0eeed.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/8TIdhfK/agar._io_hacked_unblocked.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/is_there_a_way_to_remotely_reset_a_router.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476416/normal_5fc809b119643.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/helicobacter_pylori_tratamiento_antibiotico.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/ritukevudanumod_binoro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_6032f0d0b0c5c.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/hdjbYnD/wozuwekuxibubewetulexil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_6031e455f36a4.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/sejakopa/pocket_icu_management.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/aberdeen_airport_information_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/bushnell_tour_v4_shift_patriot_pack_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/vivurudazokod.pdfIn PDF document text
    • http://sixexelotu.epizy.com/symbolic_meaning_of_rose_colours.pdfIn PDF document text
    • http://zelanokavekav.rf.gd/fumaso.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/is_star_citizen_alpha_free.pdfIn PDF document text
    • http://budaboz.epizy.com/fimudixodekesorarefa.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/how_to_know_everything_is_ok_at_17_weeks_pregnant.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_off000102de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 5560 bytes
SHA-256: f2b67b77f734cb877b2f7173e2c4b7b39e62908fcf1b8111dff45d799ec18b57
font_01_sfnt_off000115d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D8 12992 bytes
SHA-256: 8c10172233c78fde4bec968c3f87ba59fc5ee0de84d7458ecc5b84740f88a3df

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