Malicious PDF — malware analysis report

Static analysis result for SHA-256 642620d20469952c…

MALICIOUS

PDF

88.1 KB Created: 2021-07-03 02:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6fc3388c15cb555489ac1a55e75575e7 SHA-1: 9bcc159edabc13c421974af456fbb0327ea7c9cd SHA-256: 642620d20469952c2bafe1009466080a69e02b6a8309904700a7212516f6fda9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document that contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of multiple URLs on compromised CMS uploads suggests a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://evergladesharvesting.com/ckfinder/userfiles/files/pejuromolusano.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/tfe8arv83bt6ckigk9gd0ml4r7/92780034154.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/2f762b5a4470b5d7922a714150748cd9/99609966952.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/9753f26983fd5a54b3eb95f6d947fcfd/vaxavadasikedeva.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de70f64a0d6---20797145248.pdf
    • http://rolmech-strzelno.pl/Upload/file/9579859777.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38f8d5192f---futaxabajuv.pdf
    • http://afghansolar.com/userfiles/file/50702688042.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/acaoa3820vi0si64m5gke9g8s4/jodexaxokogemijojuxur.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/e35dd69cfbe686fa93e6df20a54358c9/14519796824.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/9q9dbsk7pccliqnfcsvthbl53f/fomalinera.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/572d9b4e46ef4709d9a4a1ec64b54325/8094763270.pdf
    • http://tktravel.shop/FileData/ckfinder/files/20210622_1031AE4C06649BC0.pdf
    • https://aradovan.com/userfiles/file/jutag.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/gajlogvcsdvahslbnb8d5gg4j8/2281488950.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/qj2s65l4dek3dh8ltmo5vsmnaq/banidofadozoxo.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/6dbc9773637716367aa576e722714f99/62712149385.pdf
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/jidixolepixofirurawe.pdf
    • http://altinay-law.com/images/file/91191276439.pdf
    • https://alyosserspneed.com/userfiles/files/lolelukupulutana.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/bf87d4ccd9baf33cd4398497af188cd3/segufazur.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/cntjk50jn642qa1iq3cfcgelgg/nulogezixog.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b963501b652---84908606524.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/80690c616ec48dc43c664e117b648845/mozimuzunaxobobuzoriw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=download+ppsspp+naruto
    • 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_off0000eb44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 16792 bytes
font_01_sfnt_off00010356.bin
a52a829003199f5bb951936ef63f1fdafa6792a01bdc2075db9e0f32157e2aa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10356 22340 bytes
font_02_sfnt_off00013bca.bin
0b7e4db8345c579891d2a84fbd0f2f3d4d199dc98afec976e4f0d32086f4cc84
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCA 10348 bytes