Malicious PDF — malware analysis report

Static analysis result for SHA-256 849a911472f923eb…

MALICIOUS

PDF

89.5 KB Created: 2021-03-07 02:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ae3869b2005dc9ddca345ace5dc66d1a SHA-1: f322d31eb4a5972906b4e45033aee1641b149f81 SHA-256: 849a911472f923eb649f38bd29a2f8a01b5af786a7f34f90a22ac0cdcd3d9042
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 0.9997

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://ponafet.ru/wix?keyword=wwe+immortals+apk+download+revdl PDF link annotation
    • http://kikababono.mywebcommunity.org/tamopima.pdfIn PDF document text
    • http://pufaxokijajijev.22web.org/balanceamento_de_reaes_exercicios.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/9757066.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/3298505.pdfIn PDF document text
    • http://gisimijesizugo.22web.org/wawiwigomukebod.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/saint_augustine_confessions_henry_chadwick.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/orthodox_prayers_for_all_occasions.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/nugudojadipogifufavotovin.pdfIn PDF document text
    • https://zazokovorif.weebly.com/uploads/1/3/4/3/134321981/9db9a75f5.pdfIn PDF document text
    • http://wediwutesifetuw.iblogger.org/belexufekowedex.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/752c1063-147d-44b0-a533-cb1b06452742/vanirodufiwuxovuxenuju.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/44090383881.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/89166239144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d301b4ea-8b59-4262-8726-e1a720fc8bfb/redagizifusabeguwire.pdfIn PDF document text
    • http://rozipiliwune.epizy.com/how_to_change_a_lightbulb_in_an_electric_fireplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85af1e9-f744-4772-ab2f-c553f24a3b00/how_do_i_program_my_avaya_9611g_phone.pdfIn PDF document text
    • http://nijuxejo.epizy.com/zuwilezivazel.pdfIn PDF document text
    • http://vufuwulofakugef.rf.gd/bearing_size_calculation_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4318757e-95a7-49b1-8a68-1fb8e4a2b1ac/21923699595.pdfIn PDF document text
    • http://zelagipu.rf.gd/jalolobumomomek.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_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 10404 bytes
SHA-256: d5c6d840110f278273f03051f7a64761d7ebb40ff49025b1ee1586cb54d72db6
font_01_sfnt_off0001215e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215E 5336 bytes
SHA-256: bdf8391542e2f633b5930a15ea3c99b687e1ad5110263ecf3c787f895a7ce3ef
font_02_sfnt_off00013380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13380 10896 bytes
SHA-256: fed6b5a8c093c6ae3f50288ad774220da7b2cd4876ddd1765d6f15371b62b21c

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