Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1119f309e3bc00…

MALICIOUS

PDF

91.6 KB Created: 2021-06-12 00:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4373f73f061ede558023a47b89655b25 SHA-1: b4e0c4e01353dccd0f81d740e21d018a3e795273 SHA-256: 3e1119f309e3bc00bb006e629d5cf07b1075130d04717e17f71ed491e3053989
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://botokaw.ru/123?utm_term=jdsu+hst-+3000+t1+user+guide PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuvebag.pbworks.com/f/kekukorosizalekonekiv.pdfIn PDF document text
    • http://jubujefaj.pbworks.com/f/nesarewilupitasoso.pdfIn PDF document text
    • http://sagidetubi.pbworks.com/f/vidakuditezesupawe.pdfIn PDF document text
    • http://giresizuloki.pbworks.com/w/file/fetch/144619284/73951000930.pdfIn PDF document text
    • http://wejojixi.pbworks.com/f/foxwoods_casino_hotel_suites.pdfIn PDF document text
    • http://wezenibafasi.pbworks.com/f/where_to_get_cheap_fish_tanks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/888ab9f7-e5f7-41cd-8290-73bec5ddbabf/91263781335.pdfIn PDF document text
    • http://nabivebufi.pbworks.com/w/file/fetch/145092603/zara_zara_bahekta_hai_song_download_female_version.pdfIn PDF document text
    • http://motekus.pbworks.com/w/file/fetch/144691716/how_to_resize_a_nixon_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e942988f-85c5-4de2-9cfc-6986035e6103/72184894216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7218918a-50db-40d4-8281-4d3ff09b1429/steins_gate_episode_length.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78132372-7923-4905-949c-9e8cdb928903/wukawukuzusazibutur.pdfIn PDF document text
    • http://sonogari.pbworks.com/f/egyptian_gods_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75d99ff-edb7-4071-a782-c31db6206d7f/pidozezekegelavidaso.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/w/file/fetch/144442815/how_to_read_computer_binary_code.pdfIn PDF document text
    • http://xixokuzujoz.pbworks.com/f/24114194613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/243c138c-bea3-48e9-8697-0eca1cd7d8cf/what_does_child_led_learning_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0abfc4cd-0134-46cd-98f3-ce5c09bf9981/what_is_english_for_specific_purposes_esp.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/82401695631.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/144572997/92931879335.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/w/file/fetch/144616383/collection_on_facebook_nyt_crossword.pdfIn PDF document text
    • http://rixepal.pbworks.com/w/file/fetch/144508572/asphalt_8_4.3.0j_mod_apk_anti_bank.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_off00012929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12929 5224 bytes
SHA-256: e055c4ffc491459e64d787574f9736b51954e18b676ae33f6745a67deb70b013
font_01_sfnt_off00013af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF2 11200 bytes
SHA-256: d1516b9b448ead11e6a1b1725d4b4e321e430c8318213860ef68c6323f1dfd39

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