Malicious PDF — malware analysis report

Static analysis result for SHA-256 5158c130a56ba75b…

MALICIOUS

PDF

80.5 KB Created: 2021-03-16 07:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1fb83dd941eae6f150a5b5a960781a5f SHA-1: 953e6c9c94234b5ddaed128fb3324908641d822b SHA-256: 5158c130a56ba75bf90318367e6fc1c54cc49b583c7cb26876348049600bf83c
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=what+are+the+smart+goals+examples PDF link annotation
    • http://povujusuwaveva.iblogger.org/mepuborivivevifusenefese.pdfIn PDF document text
    • http://detonicufficiale.website/19745490210xoubd.pdfIn PDF document text
    • http://milanbeachs.space/the_introvert_advantage_marti_olsen_laneyuzh74.pdfIn PDF document text
    • http://duzuxilobovix.iblogger.org/dk_crayon_font_free.pdfIn PDF document text
    • http://xarijigok.22web.org/blockman_multiplayer_vip_apk.pdfIn PDF document text
    • http://effektzhizni.ru/xejadesimuxifid47t0.pdfIn PDF document text
    • http://opencabinets.xyz/proc_univariate_histogram_y_axis_rangeexub3.pdfIn PDF document text
    • http://doxisolawasusig.66ghz.com/adobe_after_effects_aegp_plugin.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/chamberlain_41a5021-1f_partscfeja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kebewuf.rf.gd/capitalism_and_freedom_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05dfa0ea-55cb-40c4-9d07-b959cce31c7a/yoga_mudras_and_meanings_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/libededuranorodebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7195172-2764-4bb4-a9d4-fb4149dbeb6f/40973437202.pdfIn PDF document text
    • http://gixunamob.epizy.com/guwemikiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/435e2af8-5aad-493f-8849-efde9f6aeb3c/master_of_the_universe_edward_and_bella_fanfiction.pdfIn PDF document text
    • http://saxowuwu.rf.gd/xovakegenijajosafij.pdfIn PDF document text
    • http://lerefub.rf.gd/lagu_angelica_hale_feel_the_magic.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/calendario_2018_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ad3506-9933-4944-89da-8a116db3e9ab/el_significado_de_la_palabra_guerra_de_guerrillas.pdfIn PDF document text
    • http://buxazub.epizy.com/94515467232.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/guredaduvokobatiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/148e7573-bf90-44bf-aa05-d6690b64cac4/craftsman_air_compressor_parts_regulator.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_off0000fedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDD 5312 bytes
SHA-256: 8a2a9679dfc20277bf72a9f6c1d11f3f135fcd3506b7bd58ceb373c93930e425
font_01_sfnt_off000110d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D6 10476 bytes
SHA-256: 89555eef57887a1333f7c958897cd77fb64a2bbaa3564f0b1019cd7518fb3ab0

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