Malicious PDF — malware analysis report

Static analysis result for SHA-256 5178f860c5a558e9…

MALICIOUS

PDF

73.9 KB Created: 2021-03-09 09:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c6945122057ce745fa7114f6184693c0 SHA-1: 9b1591a853e716eedee7f725b97f83ead172442b SHA-256: 5178f860c5a558e989b0c84c64412c514c76832cb97d22cc07c4c58ffb1f9f00
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 0.9991

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://jottigo.ru/123?utm_term=birthday+wishes+in+marathi+video PDF link annotation
    • https://faneputivodi.weebly.com/uploads/1/3/0/8/130874667/worizidezizije-dekipenix-girekakexalele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_5fda8c9249c6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403679/normal_5ffa7253be556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379856/normal_60445fca87b29.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/1ififgc/76389851305.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/eieAjdQ/bozax.pdfIn PDF document text
    • https://kewatedodi.weebly.com/uploads/1/3/0/7/130776291/5666531.pdfIn PDF document text
    • https://duxotitur.weebly.com/uploads/1/3/4/5/134596147/98a8ef3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417530/normal_5fce034defb26.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/google_drive_movie_sites.pdfIn PDF document text
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/bf6d924a1781.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419849/normal_6005f4b5d477d.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/2b4ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471249/normal_5ff61299c6687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_60208fb3e909d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479433/normal_5fc992336a7ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://pogitijerilux.epizy.com/eraser_apk_app.pdfIn PDF document text
    • http://fogosapew.epizy.com/aaru_paranju_song_320kbps.pdfIn PDF document text
    • http://kesufelitam.rf.gd/zamumewer.pdfIn PDF document text
    • http://zutibebasonuf.epizy.com/38744239639.pdfIn PDF document text
    • http://suginuzebaluwom.rf.gd/trainee_flight_simulator_maintenance_engineer_job_description.pdfIn PDF document text
    • http://tibilekozox.epizy.com/70719114608.pdfIn PDF document text
    • http://zatojigetafugud.epizy.com/tufavumogaxabafu.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_off0000d2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EC 5336 bytes
SHA-256: 0193032da445fcaab9fdc110a803be99ac64ce1d10c14273bbd81683eab5695a
font_01_sfnt_off0000e500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE500 9784 bytes
SHA-256: d9732a033ee2088485adacbe445097a7802b25b56d73f9d694d782d33f0c17c3
font_02_sfnt_off000106cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 4520 bytes
SHA-256: df819e83e91e9f3257fdb9a386ef7206067ed34faf1435acaa01735a9a2cd67d

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