Malicious PDF — malware analysis report

Static analysis result for SHA-256 428aada70d0deea6…

MALICIOUS

PDF

91.5 KB Created: 2021-05-19 02:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 612fad0d58ad4ce3d08266fbf806c4ad SHA-1: 5b2fa8c2bdcbf8ba1c69d38ff1e51b71772923b0 SHA-256: 428aada70d0deea611c625075f9b0ab7b86163e78f80c830f8f8a08c73303ef3
156 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 0.9996

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 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.
  • 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://gimoguvi.ru/strik?utm_term=is+2.2+geometry+dash+out PDF link annotation
    • https://kolidazab.weebly.com/uploads/1/3/4/6/134663239/807e393e5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467979/normal_5ffbdec56c07d.pdfIn PDF document text
    • https://jasadugo.weebly.com/uploads/1/3/5/3/135341750/wiwokenekefidag-guwaw-vuxunolijazifom-supuwaven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483587/normal_606c6f52465eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426262/normal_5fc7cfb22679b.pdfIn PDF document text
    • https://vedewoxid.weebly.com/uploads/1/3/0/7/130738666/4216112.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/zerepuzuze/86833755326.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/how_to_say_thank_you_for_quick_reply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcfdb87-6be5-484a-832b-27dd5edacff2/69306558152.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/logic_pro_x_for_dummies_2nd_edition.pdfIn PDF document text
    • http://natelizijiliti.rf.gd/63981230889.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/65668121459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c878327-6f13-4bdf-802d-379566f3ac17/66024480116.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/61820107418.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/bonafide_letter_request_format.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/mugulanujonat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3baa183-7b39-4e97-89ae-1eb31b610cf0/xejawubuninaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/have_yourself_a_merry_little_christmas_original_song_lyrics.pdfIn PDF document text
    • http://jojanotesejivi.epizy.com/guided_meditation_female_voice_sleep.pdfIn PDF document text
    • http://weforonezanofo.epizy.com/sigokojukijilobosepi.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/girarixojitamojadititugib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca565e53-1734-43cf-9cee-215182523482/87829448422.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_off00011ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF9 5412 bytes
SHA-256: 5d69b958b6000ce31e3e160cdffb52c6e4d5419fba77a4a338e340385231fce9
font_01_sfnt_off00013140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13140 14928 bytes
SHA-256: 57683a3f27ee483556fb0290d784b4076e9ee9d1c5b0e3115e9cd6284a6d89f5

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