Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2729277801618a…

MALICIOUS

PDF

86.0 KB Created: 2021-04-08 18:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2cb694d08732136a5e240268bd844408 SHA-1: b34b71f4d42eee6a54a5e5174eb0d7b4bd575a1d SHA-256: 3b2729277801618a9d01546a521194f95b4c1f44c7c3f4db14181c3818382228
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and one specifically uses a UTM term suggesting a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the document's purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xajibur.ru/strik?utm_term=how+to+critique+a+play+script PDF link annotation
    • http://bloomwithdeanna.com/sidevadeay41.pdfIn PDF document text
    • https://cdn.sqhk.co/wabitakenina/9jaihVl/rafisamusutubut.pdfIn PDF document text
    • http://lightstart.xyz/who_are_the_patron_saints_of_animalsevc1d.pdfIn PDF document text
    • http://hermidkovo.info/are_huffy_bikes_any_goodcx1al.pdfIn PDF document text
    • http://nuveclovet.xyz/how_to_use_the_left_side_of_your_brainsc3hd.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/cgehjha/lenovo_laptops_charger.pdfIn PDF document text
    • http://arboozfilm.com/862810304850ocon.pdfIn PDF document text
    • http://namelesssouth.xyz/1402072088264xre.pdfIn PDF document text
    • http://parralax.net/lazilomijubugurapapuluk80wfk.pdfIn PDF document text
    • http://wowitaly.pro/gotakepozvp9sa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_e43f2c7f5c3945f0b26feb3fc5595d24.pdf?index=trueIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_d747ebf877dc440f9f479a3c7c372301.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/72759923552.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/fall_into_the_abyss.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_100efff3982440b4ba85f5124ee93614.pdf?index=trueIn PDF document text
    • https://fc59733d-949e-4df9-817b-fea2515c5cc7.filesusr.com/ugd/689329_3428219b068844ad914f8d5f535480b0.pdf?index=trueIn PDF document text
    • https://5d55c623-01b0-417f-8131-8dfd0334080c.filesusr.com/ugd/9ef046_8db3c47fd5044fb382493963b45df8c9.pdf?index=trueIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_b52c281ca6ea4b9ebdb9b20ef45f071a.pdf?index=trueIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_bc1a36896a8849fd8b0720aa6bdba854.pdf?index=trueIn PDF document text
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_8a69583235a44d508a9f95044dc10e13.pdf?index=trueIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_8de62fc4554c416d9b584ef5a3aafb02.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93B 3520 bytes
SHA-256: d7323be295025cdbb5be6999149f2aaed6c9e9cfbd6a89c2c9e387d6d1f61b55
font_01_sfnt_off0001059c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059C 4984 bytes
SHA-256: 7b77556d4eb6fe561af5105ea0d3e7ef048a1de52e9d85cd295ad99e03ae4777
font_02_sfnt_off000116bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BC 10960 bytes
SHA-256: 6ff01906d2f43ad791577ec27208706554a3560ba8779ef65dfbe60f52d24dea
font_03_sfnt_off00013bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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