Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae2eedc97b3bf97…

MALICIOUS

PDF

82.8 KB Created: 2021-03-22 08:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f866c79f71d0849790b001553137beeb SHA-1: 3d165367dd9f6ca1865c0a77c9b2dbce87c1c0b6 SHA-256: 9ae2eedc97b3bf9746f1188a19e38aa95efe8677689c1de5d74c349e8de58aee
186 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 6

  • 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.
  • 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://vilenefex.ru/strik?utm_term=behringer+xenyx+x1222usb+manual PDF link annotation
    • https://jerewetazawupej.weebly.com/uploads/1/3/4/3/134384555/xalajimugojewuvib.pdfIn PDF document text
    • http://gratoramaa.space/kuxodopuvinetugapoka99vxk.pdfIn PDF document text
    • http://nonretloli.site/blocky_zombie_survival_apkoik3p.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/jhixqhc/jozigoluda.pdfIn PDF document text
    • http://pixxel.life/makeup_bag_sewing_patternnbxqm.pdfIn PDF document text
    • http://erse.xyz/bluestacks_apk_yklemecc4x5.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/joboz_sifiz_zoxowolabiru_moravivoxenadel.pdfIn PDF document text
    • https://lafowujokunoro.weebly.com/uploads/1/3/0/7/130738997/davijo-wowisukuwu-tekuv-dukoloxuwazafi.pdfIn PDF document text
    • https://neruzubegakakew.weebly.com/uploads/1/3/4/0/134017499/b5cd6f2e9a11863.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/ghg3HPg/2272591820.pdfIn PDF document text
    • https://cdn.sqhk.co/gasowifozil/g96SsVj/53621961696.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_d2492d1dfec14de7bf050208dfdd6883.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_972bc919b0c5481fb42c0ba0d78dd95e.pdf?index=trueIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_0647d2b7723444249ce53babb4cb0424.pdf?index=trueIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_c882be941bbd4d7b998b132305a66651.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6f0e63-99fc-49a3-94fc-a88a443589aa/what_are_the_types_and_classifications_of_antibiotics_and_their_actions_ati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2484c0-1b27-4e8e-8158-a8ba48df3325/samsung_qled_55_q7f_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6b7610-2661-40e6-b40f-5c83d9f9a6f6/amc_12a_2019_cutoff.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_off000103df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 5644 bytes
SHA-256: 8eb0bf1909552f99f3164b03c4e40d41144809fa59cdbc8be718522d1ef77f2e
font_01_sfnt_off000116f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F9 11096 bytes
SHA-256: 4a69b27aaaa421ec56ed3d8bb2bdc7e959a42512d66ebe2060815294f777fff9

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