Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e0278dd79f6401…

MALICIOUS

PDF

80.8 KB Created: 2021-03-06 06:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1e288bc534ce0e132d1157fceeeed828 SHA-1: 307ff69087de5faff46b18173e10e70c6a5e2f83 SHA-256: 23e0278dd79f64018ec8c9b0126d4d49b731a0c1f190d278fb5d94d353796a7b
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 0.9998

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://bologen.ru/123?utm_term=parts+for+brother+knitting+machines PDF link annotation
    • http://befotuke.mywebcommunity.org/rii_mini_wireless_keyboard_with_touchpad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_601ad2f59e9af.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/56349475183.pdfIn PDF document text
    • https://fofifiso.weebly.com/uploads/1/3/4/6/134613093/19cd435a0de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5ffd825f125cb.pdfIn PDF document text
    • https://xoluvaxabezil.weebly.com/uploads/1/3/4/3/134338990/runitufuk_nekijamevore_vatiwamubelomu_pirekuvebinuk.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/5b0b1.pdfIn PDF document text
    • http://zuzatew.medianewsonline.com/more_than_words_tab_songsterr.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/wiwamoxamo/synonyms_worksheet_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/xawasisivamorofetokirusaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6a2d1b-85ef-4372-b9cb-e7356b339f35/fire_and_blood_book_plot_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2738c6bb-a1b5-40cf-a192-d95e00259e71/what_are_good_words_that_start_with_t.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/s2_netbox_extreme_default_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315fece2-3a64-4fcb-8495-d2e12b043c8e/51477911233.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/pakistani_movies_in_hd_websites.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/64365182455.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/omega_remote_start_not_working_nissan_altima.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47B 5680 bytes
SHA-256: c53d2028e9dce098ec4ab6ee62ac671ce939d36f5ce6bfc070aa350b8bf14d62
font_01_sfnt_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 5468 bytes
SHA-256: 1cf88442c315ec53f728fd8c36db32da6bdb9507f40977d02cf59c914a1a8964
font_02_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 13108 bytes
SHA-256: 85e26c7848b9d8665a50a83b40aeb45f987c6d6981d7445606a5f72cb2eb215b

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