Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe052843b24d1c3…

MALICIOUS

PDF

83.1 KB Created: 2021-06-29 00:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8e15b865c9ede44d6759fc319460cfc SHA-1: ab3883403cfdfc8dec9b8938ab8f1e872c9610ff SHA-256: fbe052843b24d1c35fa514c269d3e55782bc973c777dcd6384b12c421b03f916
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress sites and disposable hosting, indicating it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://rh-h1tapi-turbo.com/contents//files/digoxutitajigu.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/a54302d2f447731714fedf11cd578bcf/73301290011.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce5ed349e1---rarotedudodegepukibapa.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609820acadf5e---66515932050.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/g48n7i1aqit3ia2oem74olbf06/jopoxeselavulafabegugeb.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16085780043d64---53878929718.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4d8b916ddf6d8a9ea2c59161ed3d4939/448436965.pdf
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62574510536.pdf
    • https://bahamianbrewery.com/ckfinder/userfiles/files/xepurav.pdf
    • https://eyetracking.pl/userfiles/file/48589636594.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d85ab16e7---9737695070.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c1d3961fa---54998905888.pdf
    • https://allmassage.net/upload/file/20210526115153.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160be5eed551b1---latidokutekemoledanili.pdf
    • http://hainescentreasia.com/images/file/78721405454.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/23f04c0dc5b0b0aaa01083328a739d14/xisogonazegilu.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/dezinupunugonevodi.pdf
    • http://byty-pardubice.eu/UserFiles/File/josegafonuvemiralof.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/b5c6da58ee62d787bf3c1a2933b65b5d/supisodil.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf01875e178---vamowaw.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/72e51ca2c09afa476965c334edb28b0e/jejubemir.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16098a2c43bd14---lisokajigawekexiwikom.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c0ee2d50c---xekupekatob.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=a+cousin+once+removed
    • 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_off0000e374.bin
2665dbd88a893476ad40331b2ae5250121523cdf708ef15d457507497108151b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE374 10372 bytes
font_01_sfnt_off0000fae9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE9 16792 bytes
font_02_sfnt_off000112fb.bin
6a1018ea7f43d64a764165e7b47049f4fb9d3fd9c16a480290f9e6cd867ea26f
pdf-font-stream PDF embedded font (sfnt) at offset 0x112FB 16540 bytes