Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54227e835a3d113…

MALICIOUS

PDF

81.1 KB Created: 2021-06-29 07:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 880e2b1d7ec6ee3ad674d380b7fa961c SHA-1: 36498d739bb5a71f0299993a34437ad56f5ff9a8 SHA-256: d54227e835a3d1132c40fe48d090cd570ea84e2aae63b2284bfc91b667361bba
196 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised or disposable domains, suggesting a link farm designed to distribute further malicious content or phish users. The document body is heavily obfuscated and unreadable, but the heuristics indicate a lure related to lotteries, prizes, or funds requiring courier delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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://awlights.com/wp-content/plugins/super-forms/uploads/php/files/02101a3b0b009f5c3f96749ed0a68e50/80365955805.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/3450654379.pdf
    • http://asiadomainstore.com/userfiles/file/woxatamuruvowepuposu.pdf
    • https://kildevangen.dk/files/mamuxojuf.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/0581e910c1bbad1872dedece14c3a167/60917445186.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a099163a134---filazimijuxatiberazub.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/676af3cn8800lmdq1t6os26pu0/99080202043.pdf
    • http://brette-animation.com/userfiles/file/74896962940.pdf
    • https://wittnebel.dk/file/jixuzamad.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9b161147d---zidem.pdf
    • http://www.knickmeier.net/images/pageimg/file/93486742951.pdf
    • http://teenmag.cz/userfiles/file/zorisivifa.pdf
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/kiwipilapo.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091902f1ffb2---pepajukeposarokumi.pdf
    • http://musorcentrum.hu/files/article/file/38660958029.pdf
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/pivejufujafebupeba.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871b1227205---zaderi.pdf
    • https://noddy.nu/images/file/kupazoxiregixoputipibo.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kasine.pdf
    • http://diysmart.net/userfiles/file/48045536742.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0ad068223---73350398091.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a7edb3ad560---pivubosubu.pdf
    • http://trustarshida.co/cache/fck_files/file/29387068938.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7be4022bd6dccb3277afa706e7847033/55093621786.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd5d1f417f---12002427103.pdf
    • http://omonetach.pl/foto/ilustracje/file/kiwelorobenubozujata.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=top+java+interview+questions
    • 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_off0000d88d.bin
1ff3171b92ad79f6ba7793be6cf2629e5b6340c3c644cda7aa44ee4b8a3c7233
pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 10688 bytes
font_01_sfnt_off0000f13c.bin
9f07ebd05c67dfd9db695c4124f663ce5ecfc6bb31b3079dc924b3c18c198ae2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 17572 bytes
font_02_sfnt_off00011ebb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBB 16792 bytes