Malicious PDF — malware analysis report

Static analysis result for SHA-256 acef8c59b7498772…

MALICIOUS

PDF

74.4 KB Created: 2021-03-13 17:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0065ce550c193ed2e2ac1e5ff8d250ab SHA-1: 03b0f2f7b9326cfbf1d97981794c0332fa976261 SHA-256: acef8c59b74987726a8012120e25f84e534e4433f0095ef9a9b9536d6392a1e3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external URIs, including one at 'https://lozipotod.ru/aws?utm_term=the+hero%2527s+journey+book+review', which is likely used to redirect users to malicious content. The presence of multiple disposable domains and link farms suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=the+hero%2527s+journey+book+review PDF link annotation
    • http://midimox.getenjoyment.net/kogosiwogosinopewu.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/calculus_1_2_3.pdfIn PDF document text
    • http://boludibaderujir.22web.org/sigalujukob.pdfIn PDF document text
    • http://duperalenow.22web.org/possessive_adjectives_worksheets_for_grade_5.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/nojutulegase.pdfIn PDF document text
    • http://zonitupupafof.sportsontheweb.net/aprender_ingles_escuchando_y_repitiendo.pdfIn PDF document text
    • https://saxijafuduzota.weebly.com/uploads/1/3/4/6/134692269/3172736.pdfIn PDF document text
    • http://ludipusoze.22web.org/88815997498.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/gavofegopot_pisasunopogezod_panogexijuwuki_kifez.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/the_four_scott_galloway_free.pdfIn PDF document text
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/farojumunex-niwugogosali-vulirivaxiz.pdfIn PDF document text
    • http://dimoguzix.iblogger.org/vovepabopesusulona.pdfIn PDF document text
    • http://mevatupumave.22web.org/antibodies_and_immunoglobulins.pdfIn PDF document text
    • http://valigulepi.scienceontheweb.net/69298349404.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://povasapodojika.epizy.com/32800798508.pdfIn PDF document text
    • http://kesojavutuv.epizy.com/what_are_the_good_values_of_life.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/automobile_engineering_notes_free_download.pdfIn PDF document text
    • http://vowojuxibaxo.myartsonline.com/xekejakolovemetagit.pdfIn PDF document text
    • http://najijojovigom.myartsonline.com/67823717179.pdfIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_87a8d2a2e6d447589e45b369bfd6d13b.pdf?index=trueIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_9712c9aa13804081a2cbc299128a47ab.pdf?index=trueIn PDF document text
    • http://veramok.rf.gd/common_quarterly_examination_september_2019_answer_key.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35D 5048 bytes
SHA-256: fc6c8ca8c92b9ccbec3859fb4729c4d5091561c0a75576515a219eb1d0878d90
font_01_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 11768 bytes
SHA-256: c273ccb06f6bbb11fcf8810bc6cda5c5469b1fe841a3ef2daeeb194ff1d4ade0

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