Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ef01d8b1203c39…

MALICIOUS

PDF

75.6 KB Created: 2021-03-06 14:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 16a3194e324f2a3407eb3438cfb2cb0b SHA-1: 56091d3df8041202428bf6f38541bd0d963e9615 SHA-256: 30ef01d8b1203c39592018bc518a61aa69b311d7e25b7cc41906c9078d1e41d2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wix?keyword=mountain+bike+stickers+pack PDF link annotation
    • https://cdn.sqhk.co/zapajugadira/zhghhie/jasevotowatobobasekivis.pdfIn PDF document text
    • https://cdn.sqhk.co/wopeporamo/egdgjEK/buy_labyrinth_marble_game.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/uigjbhe/telecharger_lucky_gold_have_a_lucky_day.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_5fdad402537b4.pdfIn PDF document text
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/8949158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5fe8ccec740d6.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/dWpjRig/bloons_td_6_unblocked_games.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/fomavotixebedamivopuw.pdfIn PDF document text
    • https://sefariduzaki.weebly.com/uploads/1/3/4/6/134665623/lonixuvedigunejerupo.pdfIn PDF document text
    • https://cdn.sqhk.co/dapumexader/iWMrjbo/panemasusepudulo.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/ford_ranger_parts_price_list.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/nel_tornado_coil_for_garrett_ace_250_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_5fde3ac4c5fe1.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/745029f2-25f0-4250-93ee-9daecd243274/verikejateveb.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/bigo_live_pc_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/jiwepis.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/47201050030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427fead6-bd23-41df-9a84-aab0cca53926/resumen_del_libro_borges_y_yo.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_off0000ecf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF5 5104 bytes
SHA-256: 0c23adab955f60a169da07bf7786699467fb9bcae2421677f27cc6f7bb1f3b20
font_01_sfnt_off0000fe6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 10148 bytes
SHA-256: cf599cca6b50f6e8c24f87132a1ad86c2d887d30611f7d1499362356dab08532

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