Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff5bef2a6c3b5eb…

MALICIOUS

PDF

75.8 KB Created: 2021-03-20 18:45:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0a61f7f6e91c0965d0906cdda117d4dc SHA-1: 14ca16c4ccd2e1e461cda7b544d8a69ab622211e SHA-256: 2ff5bef2a6c3b5ebbd08a0fdc46fa6ec2b692c9afaf4bd840abc874ffd3fbc04
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 0.9995

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 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://baarspo.ru/wix?keyword=pearson+geometry+book PDF link annotation
    • https://cdn.sqhk.co/rovujesox/jcAhigf/wufevapumakoloriwuriravo.pdfIn PDF document text
    • http://cmbespaceclient.xyz/77531118918kj6uv.pdfIn PDF document text
    • http://webcam-model.online/hisense_h55b7300uk_55_inch_4k_ultra_hd_smart_tv_reviewscbnbc.pdfIn PDF document text
    • http://50offshop.pro/easy_vegetarian_indian_dinner_recipes_for_family32gxl.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/wgAOien/17936609851.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/charlie_and_the_chocolate_factory_oompa_loompa_actor.pdfIn PDF document text
    • https://cdn.sqhk.co/javufikari/ugeiqib/kuxosagukusoruf.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/i9EKZih/28947670977.pdfIn PDF document text
    • https://cdn.sqhk.co/bimeniwog/ficuyhc/popcorn_trivia_app_store.pdfIn PDF document text
    • http://batmbatm.ru/what_does_structural_frame_mean_in_artwrwjq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_d18bee91838f4977a66879953864512c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/3755463640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0785a117-0803-4d79-a843-47f7c6f760af/22238939011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52ba343-7405-48d6-b743-f60ef6bfe574/nexus_10_android_update.pdfIn PDF document text
    • http://dijuvunote.onlinewebshop.net/sisurekokajirupesab.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_ce40cca128834f25bb2fe5b62aabd648.pdf?index=trueIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_75ff955b8f984a2e8545b168bb957edf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/pesag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178ba14b-baa0-46d6-b706-8116a6f87eda/how_do_you_set_a_defiant_timer.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_580f58bb67fe4363b02556735dbe5727.pdf?index=trueIn PDF document text
    • https://c7e723d0-7712-45a3-a8dd-8d8935e7c5e2.filesusr.com/ugd/c4f451_a9dbd22bf6fc4de2980fd5fce3efe0b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/mejokogisojijezal.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_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 5280 bytes
SHA-256: a5ab71b2d722a56cf6e58aa47edb5923ce32401ba3eb30ac2929033ba363277a
font_01_sfnt_off0000fb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 11304 bytes
SHA-256: 0991162d6ef9b72a24affd08513f0a232db4e6732fd0147bd477ef8f103d3a8c

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