Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27db2fec99b96d5…

MALICIOUS

PDF

85.4 KB Created: 2021-09-24 08:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 005b9ad9268bb064d5d03f0cbac98cd7 SHA-1: a9164659afef5ee86afebc9666c7ee9bccc547ea SHA-256: e27db2fec99b96d51d7bc061e853a20c7929bd8d9418bdc08fa34a8fa858921d
136 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries or parcel deliveries. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, suggesting an attempt to direct users to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://smidgel.ru/uplcv?utm_term=how+to+unblock+a+phone+number+on+an+android
    • https://takipcisec.com/calisma2/files/uploads/28648340877.pdf
    • http://elrey-uslugi.ru/media/file/38333885831.pdf
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/jowefivafugafasijamij.pdf
    • http://vino-charlie.cz/userfiles/file/vejeguwevigo.pdf
    • https://dolupin.com/calisma2/files/uploads/kuludopazuxitemuved.pdf
    • https://facades-et-traditions.com/actualites/file/44535069724.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161362023087ad---gudobizusufuwu.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ef93n45o8hf2i58rotdtkg8hn2/32633755494.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16143ff80998ee---21408373456.pdf
    • http://ms-domino.eu/images/file/files/74695100716.pdf
    • http://testplanet.nl/uploads/files/vudututo.pdf
    • http://medicapoland.pl/uploaded/file/15179698629.pdf
    • https://wolfgang-photography.com/userfiles/files/wuresubudawuno.pdf
    • http://peak-experience-japan.com/images/blog/file/36654522831.pdf
    • http://vimar.ua/userfiles/files/55139339808.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138a307d7d1c---wuxojakesubumobasozula.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139d5df75206---96383285901.pdf
    • http://refah4ter.info/basefile/hotelrefah4terir/files/21163722323.pdf
    • https://jonnesway-indonesia.com/ckfinder/userfiles/files/93893949033.pdf
    • https://mepho.hu/ckfinder/userfiles/files/dabirabizekaboxajivog.pdf
    • https://vibanghanoi.com/uploads/files/40311940365.pdf
    • https://bursac.net/userfiles/file/20877743016.pdf
    • http://turatabor.hu/media/92570077664.pdf
    • http://homeopathyhongkong.cn/files/movinimisiw.pdf
    • https://poganyvolgyi.hu/userfiles/file/rekazitiwawimejatixa.pdf
    • http://www.patriarca-batiment.com/ressource/site-image/files/mapazezadipelote.pdf
    • 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_off0000e7a3.bin
1aa2217ccb27248c8d53b96a4bfaf438b1fb4d671a932ac63c87c1cec8425dd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A3 18004 bytes
font_01_sfnt_off000116ec.bin
09defafeaf95889d4bc36115cb9ec524c86f9b1cf12062a69efae73eca74043c
pdf-font-stream PDF embedded font (sfnt) at offset 0x116EC 11020 bytes
font_02_sfnt_off00013016.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13016 16792 bytes