Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae49fb213ad3346…

MALICIOUS

PDF

75.5 KB Created: 2021-06-09 07:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9d3007bbc23a0f8ad749eb27916f7bb3 SHA-1: d808eaa30d8486eb1146cbcc855b9012e1855117 SHA-256: bae49fb213ad33462497ffd1dc7de87de4fb7c66741141594ee5caf417e57615
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure to download a film, directing users to a suspicious URL. Heuristics indicate this is an SEO redirector link, commonly used for phishing or malware distribution. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://synerhu.ru/pbw?utm_term=download+film+twilight+eclipse+sub+indo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369503/normal_602407267f191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466398/normal_600922ab1db16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381748/normal_6008de5e5fa35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451760/normal_5ff24951b3851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459621/normal_6050e66474157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_6046571335bf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411937/normal_5fe0430d8f8dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490736/normal_601764ac074af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462681/normal_605588f298234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449776/normal_603421f910125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480408/normal_6047c8ac7f997.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/42869dad-e0f7-4f57-ba17-0843d1e62a9e/best_remote_control_helicopter_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932fcef4-2cb4-4632-b5e0-74532c13a129/38758014850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d840326-2358-436d-a290-944cdc1b20f5/ice_cream_making_machine_prices_in_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c1e644-34b4-4802-b576-6232a6c00c9a/bombastic_words_and_their_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24194e00-c88b-4cb9-862f-326af737e366/inorganic_chemistry_housecroft_4th_edition.pdfIn PDF document text
    • http://jakomija.pbworks.com/w/file/fetch/144724770/revutumemekobamasorifeva.pdfIn PDF document text
    • http://supijexed.pbworks.com/f/chemical_reactor_analysis_and_design_froment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bb5e18-c56b-4db7-8fc7-7fd9d3aab324/whirlpool_top_load_washer_cycle_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297f6956-9f1c-45f6-bbb6-52b69675c4e4/horus_rising_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4369bc46-e4f1-4ea9-9619-b6d364fc3ddb/mtg_deck_building_guide_for_beginners.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_off0000e530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE530 5704 bytes
SHA-256: ea04d7049ad3426cc35d40040d09b65a3d3437c5624acf1ff9f91237690d6a22
font_01_sfnt_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 12000 bytes
SHA-256: 898eb445021b5bdfa214682e93d21b8db1f63e0c8625e1fe6caee8b4bc92e8c9

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