Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6d28ece5dbfc14…

MALICIOUS

PDF

81.6 KB Created: 2021-06-29 17:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a93de575f7abdcfef71a85da00853f7 SHA-1: 2e77a42b37279d68e537899c6b259803e4e1ad89 SHA-256: 0d6d28ece5dbfc14ad0737c973202c577deed24f1c65759d3e5c0fc6f62daca5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the presence of numerous external links points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://brooklynsmokeshops.com/admin/images/file/96279197296.pdf
    • https://widepolymers.com/userfiles/file/12446512954.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609aece781546---fukasonegofeliwarugemi.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/34871f17d1f32837e1c827ce9ecf5747/51137983152.pdf
    • http://allprintusa.com/admin/images/file/56381824962.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/d6c55d2ddc3c50f52fba18e9a0e9548b/sabulobapupanumukevuvot.pdf
    • http://amandatravel.com/userfiles/file/ripunamuwol.pdf
    • http://ks4073.com/file_media/file_image/file/natozodim.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/843357823bec681c5904ab52e3a6aa88/puwabedotikoxafizute.pdf
    • http://gistys.com/userfiles/file/gugisipozapu.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/6am639ss1u868aqmp1oqt7fjg6/66428596745.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/5254349898b7747c567a708b3136015d/folavuxe.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833a95f26e9---vegiwulegepop.pdf
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/9970914147.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609627e28199e---33896413047.pdf
    • http://ankurgroups.com/userfiles/file/11896441586.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93839ad26---kegejulujonexelaf.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9f36d2d38---kekusireg.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/ad3e1b6c64109cc502f1fe47c760e8a4/79200220117.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/crv2v28tg2s8daoq67i69o5qg2/remafivovovadutenofo.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/2338862558de653d170b9b113e4c9d4e/bomilokezukimeb.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/3974a0e9fb57ea31696fe4471e1b4a26/widexeropagoni.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/42bf35eb2dca5dc27159267619814372/88944752552.pdf
    • http://ahkjt.com/upfile/file/sawolezezafezesavazuje.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077af4c05be3---fuxakirebudebisid.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+cookhouse+restaurant
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fa.bin
4163e3662c70bcb5e6ae20e073ba123c7b98b0c5ce2c73dc5cefd9451223157e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 17960 bytes
font_01_sfnt_off00010958.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 16792 bytes
font_02_sfnt_off0001216f.bin
c84b126eea51fe22db4f2da426b171c34176c1c5211e20caeaa5510dd904bc49
pdf-font-stream PDF embedded font (sfnt) at offset 0x1216F 10344 bytes