Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5eb539a002c6b4…

MALICIOUS

PDF

94.9 KB Created: 2021-06-02 18:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1ebc2be85e828c82508eadd10109694e SHA-1: b973507f675da28e6cb2e7f94aac9515bbef2269 SHA-256: 2e5eb539a002c6b4417a19bc0fe5264cf4fd4f7790daf5db7df1060585702e2b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://coretry.ru/pbw?utm_term=honda+goldwing+2021+price+uk PDF link annotation
    • https://mipadabu.weebly.com/uploads/1/3/4/7/134751654/rekamopeko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498971/normal_606349c4be9c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_6055207d5776c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480173/normal_6026bddd8906f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485705/normal_604ccd4f6d902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494648/normal_5fc5b48f85580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_5fe8f9319b34b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530036/normal_6038b445f0c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_600fd555654e1.pdfIn PDF document text
    • https://danegatazi.weebly.com/uploads/1/3/0/7/130776269/3ae0f984c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375076/normal_5fff052b9849c.pdfIn PDF document text
    • https://tilevofatuso.weebly.com/uploads/1/3/7/5/137513428/b8e3c039c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_5fd3698c78fba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470526/normal_5ff191de0f03b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379374/normal_5fdd5f143522c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5fd2d8d054827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_6044d1b84ae1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_600b65ffe4fd9.pdfIn PDF document text
    • https://nusuvonofa.weebly.com/uploads/1/3/1/8/131872273/lezaperizaz-kiwas-nobaruterib.pdfIn PDF document text
    • https://purelukanixavaj.weebly.com/uploads/1/3/1/4/131454065/lorefekufiweni_kikuxub_zozaruxomise.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://masawumel.pbworks.com/f/linux_mint_19_tutorial_for_beginners.pdfIn PDF document text
    • http://wiliser.pbworks.com/w/file/fetch/144466383/10.snf_karmlarn_ayrlmas_test_sorular.pdfIn PDF document text
    • http://wuranosa.pbworks.com/f/mivugejipapudodoxuvo.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 3372 bytes
SHA-256: c3b9b086268233e58a8e165f0a5763ff88c93198db528b1e16c02f163084632a
font_01_sfnt_off00010952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10952 5508 bytes
SHA-256: 655b6f07f4a657f89ff5e56ca2df84f6af782573a44942e2772412bed4385c54
font_02_sfnt_off00011c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2C 7932 bytes
SHA-256: bd02e9339eb90f4b25860cd6cd4bdbedf8642ac24cff98db597c50d60580673a
font_03_sfnt_off000130b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B6 10592 bytes
SHA-256: ada31fb2c95084fcdc9155077c0b71791721347b17464b856c38555f5daa248a
font_04_sfnt_off000154bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154BC 16452 bytes
SHA-256: c7e3a9200d6a46483e70afda76a25aa7a8239be19ef7bbe69a6ec4221a056d5e

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