PDF malware analysis — malicious · fa041494767f1c71

MALICIOUS

PDF

89.2 KB Created: 2021-08-25 23:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 0cb61dda83ab287cb7ae3457d0ef25ae SHA-1: e1c41cbd030f9842e7748ea0a03206b39eb10b0b SHA-256: fa041494767f1c712172d7ad83c8cfc2c67d407d77fbe61400ed1c1e878fe9ba

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing lure or a downloader for a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://yuanjen.com/ckfinder/userfiles/files/vibifiriwazegupavoga.pdf In PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/50b11f5fe5a0722460f447165940366a/jorovowododan.pdfIn PDF document text
- http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/6bce979fe5b1bc59b80c1d8215710719/pururokagele.pdfIn PDF document text
- https://qpshouse.com/upload/image/file/fobugeki.pdfIn PDF document text
- http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0e00b09a4---sudepanur.pdfIn PDF document text
- http://falerisztika.hu/tmp/ziburoguvezozobaf.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/cbdf4adbab6bdfea4a95203ea731067e/fowarowuzebivazifidewan.pdfIn PDF document text
- https://xn--nmqu14inmf.com/upload/files/57766676098.pdfIn PDF document text
- https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/boberamix.pdfIn PDF document text
- https://volnynaklad.cz/data/file/8968045722.pdfIn PDF document text
- http://kaitosushisb.com/uploads/files/zadejew.pdfIn PDF document text
- http://moyamoya.center/images/hand_uploaded/files/kodemijukogipegexavoxota.pdfIn PDF document text
- https://www.jakketoes.be/ckfinder/userfiles/files/2271083378.pdfIn PDF document text
- https://ms01bet.net/contents//files/dunasofanamazi.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094137b33fe9---14484391925.pdfIn PDF document text
- http://crisismobile.com/ckfinder/userfiles/files/wikekir.pdfIn PDF document text
- https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/po5ae3rp2o0l65tei45vnom9es/juxalutozi.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a649ab654d8---86625878901.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a740a9c58b2---kodav.pdfIn PDF document text
- http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607727906c51b---welamumozari.pdfIn PDF document text
- https://thefertilizerequipment.com/d/files/manasepixuzub.pdfIn PDF document text
- http://okfilm.kr/userData/board/file/ninugimerizufesuxorarigu.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d1d9f0d35---jolorapakukevofoti.pdfIn PDF document text
- https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/kg9pg19tr8ea0p7bs0lbmjd43q/vitisoxosisujimoxolago.pdfIn PDF document text
- http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079f0ec84126---39025987085.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=provision+meaning+in+kannadaPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d840.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD840	20500 bytes
SHA-256: `74056b44d77c228200ee589083f6482d66916f77637e937707fbdb3dfefa50b9`
`font_01_sfnt_off00010d7b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D7B	10604 bytes
SHA-256: `ea44b3acef98feba2bedc8342ece3bf2f25f79e9428189a3bd56a4dc9906e31e`
`font_02_sfnt_off0001257b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1257B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00013d8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D8C	17100 bytes
SHA-256: `af6352c6d9b0e605407c38fa74e817a8d81e4c92f12c4f8e92d0996264b0d156`

Open this report in the interactive analyzer, or submit your own file for analysis.