Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae56a1767912653…

MALICIOUS

PDF

118.1 KB Created: 2021-03-10 14:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 021c3f81aba375f9f9f6ff5653c0d2b9 SHA-1: 55e887bb57ccfbcea83277642feaee6e9b899dda SHA-256: 6ae56a1767912653512b57e0ac9309fd908a6e99b7254b23d224354943df6bbe
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-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://jacksth.ru/strik?utm_term=is+daphnia+a+zooplankton PDF link annotation
    • http://roflan.site/30729206256jhi9.pdfIn PDF document text
    • http://winoraama.site/belomakasirajaliougdq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_5fdb53ea6c483.pdfIn PDF document text
    • http://rebelliona.online/teninovikonisewomunwo7x8.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/monasufalikazigogudegi.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/bubagivuzozevoles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_602f11f99de5d.pdfIn PDF document text
    • http://trynon.xyz/how_long_does_a_bacterial_culture_take8al1i.pdfIn PDF document text
    • http://kuxni.su/fantastic_beasts_and_where_to_find_them_book_serieshnvd9.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/bakaworudav.pdfIn PDF document text
    • http://hdvideo.design/68857422833spj3w.pdfIn PDF document text
    • http://autokenn.com/tosatekonanorizoteti3msag.pdfIn PDF document text
    • http://ru-order-687646765445.art/1322221155459g9j.pdfIn PDF document text
    • http://tegor.xyz/97792203783gimfr.pdfIn PDF document text
    • http://indir-kazan.com/togaginupizinowtvv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_601245d6f152d.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/pafexegud/pozewujutan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75800c34-034e-4637-b1ce-19cde581322b/wugogunizaludojil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07bc6890-d2d1-4a6c-9d12-89a8c4198f85/what_is_phenomenological_existential_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a8e3be-a6e6-4388-a55c-e73499426f9d/jack_lalanne_juicers_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/40237219457.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CCA 5004 bytes
SHA-256: 0a100e2fdf3a0c3bfb090d5bd3582506eb56f45c6ea2733c755bf6f07a8718b9
font_01_sfnt_off00018dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DD3 11700 bytes
SHA-256: 2adfc4a65a33952830b32e6de992997914c303b01ee0e85d6b12be4279a10f44
font_02_sfnt_off0001b554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B554 16148 bytes
SHA-256: 49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648

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