Malicious PDF — malware analysis report

Static analysis result for SHA-256 e387683acfbb53c9…

MALICIOUS

PDF

101.9 KB Created: 2021-03-15 10:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 05cb327c6b65bcee7c103bdf5c491a35 SHA-1: 16c6872eb6ea9852e96032b90091cd404e1aa76e SHA-256: e387683acfbb53c9750755520f031bc490b30ebd8af399ef5a9e4378110c2222
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-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.
  • 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://dugedepap.ru/award?keyword=parmenides+arje+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482882/normal_5fc5be76b4f34.pdfIn PDF document text
    • https://kololeranazi.weebly.com/uploads/1/3/4/5/134583506/kirilupavoxom.pdfIn PDF document text
    • https://jatazuleb.weebly.com/uploads/1/3/4/6/134662889/7581706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5ffcc3da11626.pdfIn PDF document text
    • https://velumosatowe.weebly.com/uploads/1/3/4/8/134883763/lonupived_rolejoxago.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fec405293258.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/numunenoji/20988614922.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/divergent_2_movie_download_in_tamil_dubbed_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b5a434-6b13-4d54-8503-05c2a21a0ccc/sony_hdr_as200v_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e71a65d-975f-456c-97ef-432436d784b1/32329932383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97cd220c-19ad-4bed-9183-b551a38c5116/the_ultimate_pop_rock_fake_book_4th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8b59f4-352f-4b2c-85a0-96ae3194000c/74386767580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d39db8d9-a420-45ab-9919-829fdd06c25e/ps3_controller_battery_price_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/album_song_video_malayalam_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83392799-f80d-4cfd-b76b-4e997cd8ce99/kiwaxifewukaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cfefd23-f68a-4473-abdb-5a3e208d51de/kali_linux_nethunter_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57e0cea-a184-449c-9400-bebaa1328438/gasikiviwunotus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2bb38c-feaf-4b4f-baf0-960cc3627fb3/33108429148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12d2381-414c-4506-afe0-9b65b4f820a0/a_fine_balance_analysis.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_off00014289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14289 5232 bytes
SHA-256: 7d7c0f2f3dbad1ee52359e3be1e449a26e55856c29a3ca7c8c300109fe1b8389
font_01_sfnt_off00015445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15445 18988 bytes
SHA-256: d8e88f2dfb708d440cc916964a965c57463dc12c787d2ec042ce1fa4c3828661

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