PDF malware analysis — malicious · 55c4e2ede3a25956

MALICIOUS

PDF

77.9 KB Created: 2021-04-30 23:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 0c1876b311025d40c772c5d48e8d84d9 SHA-1: cc4763ac066cea892139424458a7d0d96fca7094 SHA-256: 55c4e2ede3a259564f9a61de4cca5193308169e127b5eda28a4eeb0171b98d38

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to reference an 'injury report' to lure victims.

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
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://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f0e0acc2ddf7302b83dc90ddb0591410/11227117569.pdf In PDF document text
- https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/9765dd679bef641e1960555967fe0064/4506471550.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/4d981dcb1d5f81c18e5a4922c4b281a3/defupi.pdfIn PDF document text
- http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608aced9d3c2d---japaj.pdfIn PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607c72cb545d5---70466343761.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b906bac09---mujut.pdfIn PDF document text
- https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/v5rfm39781enjmrc60u4chqaf9/jawolomodoxogikuxopaxe.pdfIn PDF document text
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/469dc56ef6b04b8d98b8567cbe229e7a/6114734877.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db63a0cfb9---widakar.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a83ecb52a---45185660464.pdfIn PDF document text
- https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2b5b12b36a50ff8027a09e5480207729/roketotutogodijimexatite.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607649981a8bc---60121129856.pdfIn PDF document text
- https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/nisslht2d4h5oo1tv2k3lp150o/48639678156.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074372f13d3a---milupigilomizafosaj.pdfIn PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f79de43da3---89379933334.pdfIn PDF document text
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/372hfmgal3gjbh2j9gttmfa896/kodizusisunuxopiluwos.pdfIn PDF document text
- http://akkoryazilim.com/userfiles/file/32738946426.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://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=injury+report+packers+vs+bearsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e5a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5A8	5108 bytes
SHA-256: `b51c3e4f336e9241f3575ff65d7661627d03190118f74a90dd9d9ca4a9bdd4f5`
`font_01_sfnt_off0000f720.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF720	10464 bytes
SHA-256: `f623a30b0df81397393cf10aaa660b9aa5ae536a5ad8a268e61947b330701e2e`
`font_02_sfnt_off00011ad2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AD2	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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