Malicious PDF — malware analysis report

Static analysis result for SHA-256 060b8b87174bc7d7…

MALICIOUS

PDF

80.0 KB Created: 2021-09-05 05:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71de1c781a74ed3b306e1c5ac6a100be SHA-1: 4b66c22eeb18645aecf880291eac6b251e8566f2 SHA-256: 060b8b87174bc7d78032cdedf3ccfac16271b85f30680ad44accac1fd7559c72
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The PDF structure and embedded URLs suggest an attempt to lure victims to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://fosterfreezesantarosa.com/uploads/files/xilajavagi.pdf
    • https://norservis.com/files/files/moxugirub.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161013f31f386e---fupatosebedek.pdf
    • https://ladangmimpi.com/contents//files/825955769.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/52s1tsedbcigpdd63kkojir651/nipevav.pdf
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/vibube.pdf
    • https://dolcezzecaffe.it/file/78699196888.pdf
    • https://olgunbey.com/upload/ckfinder/files/21278665043.pdf
    • http://obchodsezlatem.cz/upload/files/61582490269.pdf
    • https://senesi-sklad.cz/userfiles/file/bodekopepobovotaxijavuv.pdf
    • http://gradn.ru/uploades/fckeditorfile/rulezimirujivajodalubul.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/a2c76d798fd2583ee2a13794cc52ad2c/xovitoruf.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rru7fbocdi2jgffb66h3bb7012/nabite.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161255a81278ec---62215814366.pdf
    • http://palmdale.thepokeluau.com/uploads/files/68280793744.pdf
    • https://plasy.com/uploads/file/15315890821.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160993d16f008d---gozofipojeb.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/865507fb2b4148edbb943e397fce1945/xabipipi.pdf
    • http://primethailand.com/ckfinder/userfiles/files/wuguvirumoj.pdf
    • http://rallyteamwalraven.nl/file/lipesozoselorujumakal.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608de3db52f4e---gavenesogi.pdf
    • http://tortsurprise.ru/upload/redactor/files/gusilotebiwaxesobikiju.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/179688a71d1b46764e92a2a1005b063b/81605463283.pdf
    • http://www.keizerco.nl/userFiles/file/saposamorital.pdf
    • http://gfhs1978reunion.com/clients/56625/File/bonaxazu.pdf
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/72837322985.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=8085+microprocessor+instruction+set+opcodes+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_off0000d19b.bin
284d2b55ce15c88a38834a49bdbc08153df464388bbc5376ac3899db10a7c629
pdf-font-stream PDF embedded font (sfnt) at offset 0xD19B 11040 bytes
font_01_sfnt_off0000eb49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 16792 bytes
font_02_sfnt_off0001035b.bin
e8324c02ed5c1300a2f367f3d5e07608fc9ba9a765dc2026ad13f7e0e516f0de
pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 17912 bytes