Malicious PDF — malware analysis report

Static analysis result for SHA-256 abad7aff5f221e94…

MALICIOUS

PDF

71.7 KB Created: 2021-09-03 06:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 410dbfb698bf49ca1062d5e8f088997b SHA-1: 920edab9ac303b8a2c5dc93d653df575ba46e25a SHA-256: abad7aff5f221e94f81822efdcdcfb829b61f2adbbf8fd7d1e81be8e3b40a88b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to other PDF files hosted on various domains, some of which are identified as compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these linked documents. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://abicecream.ru/ckfinder/userfiles/files/dijefomed.pdf In PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/gukewipoduruxufusosuvuno.pdfIn PDF document text
    • https://mattress-leader.com/media/79275767984.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/86006092089.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/72150913600.pdfIn PDF document text
    • http://teamtrinity.net/trinitya/file/lekazebiduwa.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/76062805800.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/83861160147.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/rigozital.pdfIn PDF document text
    • https://bczenekar.hu/files/file/71973173544.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210525182755_u98i2m.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/8s7os09r0kv7ts9is4d71fogop/xujogenogu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f7b5eb2ff---55567466997.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/73udmh7p32lrplbuca0j5hvg5c/24427838909.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/xamumaje.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/570d1edd00bb95fcd158343ca56ac14d/zosuxonuk.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a71473e6c40---bexepemopufelowet.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/864b1f8ce46faf4ac582193d98bea747/regefidizaj.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/ligevivom.pdfIn PDF document text
    • http://iknow.pl/files/file/40383394258.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f9d6b9c2d134e8ffbe12fd8c17c383a1/23273731029.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/5554228391.pdfIn PDF document text
    • https://exporoaster.com/app/webroot/files/images/pages/files/58107570096.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/kmn0dlc8m86uqeuda981553pvg/vesituzerifonisi.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/24152020766.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e4288def019a67a2357984efb4b705c9/nilonub.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160db4f4c00acf---menoxuva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=combine+pdf+pages+freewarePDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000b83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB83F 15888 bytes
SHA-256: c98aac6784044eef688c73e210ccc0ef1fff81812f66b3222f3282fcda880376
font_01_sfnt_off0000e019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE019 10952 bytes
SHA-256: ea61d56407edf937a0a11a3fa198548732815d1ae1a6240b911d31444f3adc96
font_02_sfnt_off0000f91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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