PDF malware analysis — malicious · b8e2b377820f7a40

MALICIOUS

PDF

91.2 KB Created: 2021-07-29 19:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 81d0955cb7adcda57a1b1f1dee1d9731 SHA-1: 5cc35e362f4eddf03b900991dc1e778f89a705a5 SHA-256: b8e2b377820f7a40f0603b9c6746344f652d0c953b59021046ed1822462338b3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9765

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://cructi.ru/uplcv?utm_term=4+qul+sharif+in+arabic+pdf PDF link annotation
- http://creptiles.dk/userfiles/file/56559510777.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b477c78d584---17298645398.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ade91f785---9767707489.pdfIn PDF document text
- https://albawadiroad.com/userfiles/files/kefabe.pdfIn PDF document text
- http://quickvideo.nl/userfiles/file/tidogo.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/71f4772d6ee454adca1500015c94e09d/75166032449.pdfIn PDF document text
- https://zohopin.com/calisma2/files/uploads/vixirajugeveb.pdfIn PDF document text
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe538c846d---gufixatemowaxujidigomo.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffee809280---zupipola.pdfIn PDF document text
- https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be316ff31e7---lejudajogegegimoxefusov.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/mujegilevogizofuni.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e71af236e6---72244277898.pdfIn PDF document text
- https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/b24e998d9e3f099a290632778d096505/42832759003.pdfIn PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/sr9kjpkthkflujc0dtlttu37jn/fonowenalesibolokuze.pdfIn PDF document text
- http://tokstar.com/_UploadFile/Images/file/navelosop.pdfIn PDF document text
- http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc89bac4ef---tirabazalovalupir.pdfIn PDF document text
- http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16c03c0be---zirarurofos.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/c7cd27acac4f0be627c843dcdcc6ed5a/mifedisofejex.pdfIn PDF document text
- http://iseveranscopy.com/upload/editor/file/lajegerepemejepedesazi.pdfIn PDF document text
- https://aplusadvance.com/naver_editor/data/file/dixanapineverad.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608162cc72688---zokisitipikajasi.pdfIn PDF document text
- https://parklanehotel.asia/userfiles/file/60548400960.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/a31885658d24ee30a3a3039eba832f41/39624901207.pdfIn PDF document text
- https://balajitutorial.com/admin/userfiles/file/mexafo.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/909j9ol7uv9m6v98dfpvklgsm0/zasawokewisovuguvoler.pdfIn PDF document text
- http://osoboebludo.com/ckfinder/userfiles/files/22796325246.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e9e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9E9	16820 bytes
SHA-256: `4bcf59af6217b4d338b59c9bc9fbe873354154540650b0cdbdde8f72d9a80cc7`
`font_01_sfnt_off0001156b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1156B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012d7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D7C	17128 bytes
SHA-256: `4b282ca57bcf3aa1b5701c3da75431b6d105f814227bf64b0e88a5251b630fe1`
`font_03_sfnt_off000146db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x146DB	10732 bytes
SHA-256: `8a7a7cf2bf3bdd3bcba6010fe8e12ae5d0ee3a0de44ddf9d597e6821b9d271cd`

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