Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7cb81ac84718cb2…

MALICIOUS

PDF

83.4 KB Created: 2021-06-26 03:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b16def77f5576eddbcdb7ba5923ce144 SHA-1: 95e4224468912d99603dec1bd0cdc1f7b60319d9 SHA-256: a7cb81ac84718cb289d18cce82406e113c5321ae8fc5a329a9b9879a16717bc6
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, or parcel deliveries. It contains numerous embedded URLs pointing to compromised websites, likely intended to host or redirect to malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://laborke.ru/uplcv?utm_term=3+levels+of+government+game
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/1133bbc96e4178fdfd1426e01abd839b/wubaja.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d843f1fd4a---32664228922.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c68ae125cd1---73419020928.pdf
    • http://alacarte-design.de/userfiles/file/92662897303.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45d0520385---77141940921.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/4fe0c889fea332fc6b1442e54add330a/luwodiwawowesokuvalego.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/446b8cdc45e8638d8afc53097dbca2a1/navosur.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/102f42088d66a7cc5e92bcec3f46dbd9/muwaregidi.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad114f1a7a7---refinofarilurikafagir.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/um8gfm99t4bqha7bosmjm9a4g4/58435019287.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/3620hvpuhph4f59ltscc5muhto/98818731245.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a471cf81cf9---gexusafakuremovopafawa.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607310a0d6463---18685119152.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d48324a75---kafosatujekerokanunejid.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/57a8d8c95e8a5bdd11582e78338f8e77/werexivuwolarale.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3de3d92009---42679912937.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/i07acia5g9h1f53bjuid74576o/bufiruzotev.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a773e4cfa5b---jinozakadofabejena.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/7d2f11ec2f9573fa13a56550ce74680e/wezuvafipavaparike.pdf
    • http://perles-del-beya.com/userfiles/file/nonodetelubaramuzafax.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/89215192472.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/853d56326bf359aee1ed454c401d45a7/lezug.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_off0000e3d6.bin
6e0fa2733d55abc0f1def6355fc2458152bb7a9b2423d4da95e86234d7a4e778
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 10604 bytes
font_01_sfnt_off0000fc28.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC28 16792 bytes
font_02_sfnt_off0001143a.bin
6d9ed86c9c590ba69870967fedad2407747c2aaf2836515fc54232c2c0597827
pdf-font-stream PDF embedded font (sfnt) at offset 0x1143A 16552 bytes