PDF malware analysis — malicious · 0ec7f257fa19cf56

MALICIOUS

PDF

87.1 KB Created: 2021-06-28 22:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 6fb309fe4b91ca455c603b0354d4bc53 SHA-1: c77c88ac6a5e9505352072821ee43474172796b5 SHA-256: 0ec7f257fa19cf565b17d2393dcc750a105eb19926dec7e0d20d30f686679e22

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing phishing lures or malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ct75nbbs97vrv46cfsfaof40m5/24784083925.pdf In PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c50fbf07c---48039555896.pdfIn PDF document text
- https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607731ecd168e---lavideroxuramuniratifuw.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6730658b1---lopilimilolumotagedo.pdfIn PDF document text
- http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3e2331b73---pitodupid.pdfIn PDF document text
- https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef327b7748---37372325641.pdfIn PDF document text
- https://adsbudget.net/userfiles/file/majevuxiwadata.pdfIn PDF document text
- https://alamansyria.com/userfiles/file/6719900311.pdfIn PDF document text
- https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/fj0b42rl3hfqaqmvclpt8rbdhl/fonalodowopavejirizataje.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hpogiraf5h8rtqnnl5boe31v87/48776628942.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e941ab4f99---28293009435.pdfIn PDF document text
- http://bfr-bialapodlaska.pl/userfiles/file/8169014625.pdfIn PDF document text
- http://janatalnajaf.com/basefile/janatalnajafcom/files/vugivasoximumewefonexor.pdfIn PDF document text
- https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815912d1f9d---jujeroroseda.pdfIn PDF document text
- http://centralcogtc.com/uploads/file/41262992156.pdfIn PDF document text
- http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b73e5de73ec---85091316878.pdfIn PDF document text
- http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/4d186bca90ed770e8287854bf67df6d1/42144203355.pdfIn PDF document text
- http://kryotherapie.net/neu/userfiles/file/xoxuwoxetigupad.pdfIn PDF document text
- https://www.alapan.org/fckimages/file/folixugipomagu.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/4426e3f26218cba7aeb818c53641f9ec/2271887227.pdfIn PDF document text
- https://zlatartopalovic.rs//files/98413603021.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7814094b9c---47008819813.pdfIn PDF document text
- https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/d3f9962ea24768e9e839812c3b23a67d/70902667631.pdfIn PDF document text
- https://actorconseil.com/files/file/nuzipuforijebatukeladubo.pdfIn PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/629hruahso3hjp1qph4qddvpo1/35929789867.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=eve+online+abyssal+pvpPDF link annotation
- 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f38d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF38D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010ba4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BA4	10352 bytes
SHA-256: `76039a7d4e2cd6d8a0a54ef64fe9b28371cdbe92ba2c2a53f26bbc78eacf91cc`
`font_02_sfnt_off000122e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122E2	17028 bytes
SHA-256: `9d22984ed1c27361c6295ab87a665f521df47758733cfc718a6cd273d2875b79`

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