Malicious PDF — malware analysis report

Static analysis result for SHA-256 62031824c6bd439f…

MALICIOUS

PDF

84.3 KB Created: 2021-07-19 11:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5e1b18aab483b1ed59c5f6717277c40 SHA-1: 900651a4bb99d560e9f7bcb672afc2bf552cc1f3 SHA-256: 62031824c6bd439f80c14a74f9ae82b7663e854ffc63879d19fdcfe3091d4753
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document's structure and embedded links strongly indicate a social engineering tactic to defraud the recipient.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e41b1ea189d---zolaj.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812babc2ebb---86200874831.pdf
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/tulunofesuguvojixe.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077070a40a3f---laguzaja.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/1834b4169a1422d01a6d6ef4abf6e7b6/93738875429.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced9742f51---39102720601.pdf
    • http://heryeryesil.com/resimlerfiles/6137134714.pdf
    • http://bettynblue.com/upload/fck_img/20210513/file/47627066505.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738e482fca2---dupus.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608328e6645df---91704595850.pdf
    • http://beadsandsupplies.com/images/file/ramoxesakazuvemu.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/wilobaxixuben.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/o0listf444eu9kr8qq56da835k/86666103672.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/37913f883020c54c9760594da7ef4a1d/notivux.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/89056754623.pdf
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/pibizufat.pdf
    • https://scavilecis.it/userfiles/file/lojesotusadifezujo.pdf
    • http://boathousebrokerage.com/userfiles/file/tinomusimitijebusazap.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/wekasomewugadabe.pdf
    • http://ags-sib.ru/ckfinder/userfiles/files/xolupugazuzitekef.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87da96a4bf---gomujoruradowof.pdf
    • http://driver-jazda.pl/upload/file/gokovif.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608af4378d9e2---pijamejelonikopuk.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=art+coloring+color+by+number
    • 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_off0000e642.bin
a53a5e008813d00b490984aeac6b0493c123db3800239fb99ba6d6b047e63a1a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE642 17372 bytes
font_01_sfnt_off000113e4.bin
f0c388f6e50520ad9cffcc1e71bbdb79a0f2f56740d3b68a48d415fa3fae9756
pdf-font-stream PDF embedded font (sfnt) at offset 0x113E4 10580 bytes
font_02_sfnt_off00012c0d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0D 16792 bytes