Malicious PDF — malware analysis report

Static analysis result for SHA-256 b079de2f4c44ee92…

MALICIOUS

PDF

83.6 KB Created: 2021-07-13 11:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: facc7386b4525d9e85fca500c16069f0 SHA-1: 2d425c340c6b25dbe55632cb0621ca90443a5876 SHA-256: b079de2f4c44ee92085f53c84ac97acbaf4f96fc0234a11bf6ccebacc42f07ea
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised or disposable domains, likely serving as a lure to download further malicious content. The document body was unreadable, but the heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/weguvijud.pdf In PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af806442fdd---lasolav.pdfIn PDF document text
    • https://kede.org/userfiles/file/33769211131.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210603132515.pdfIn PDF document text
    • https://mytopics.it/uploads/file/murazaxaled.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eefe483f19---lukoviraxozenukokitiw.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca84866473---lixeseporerugaru.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a77ede129---91284064762.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d64e5ac88a1---ruxedivivinafubif.pdfIn PDF document text
    • http://falerisztika.hu/tmp/9350309376.pdfIn PDF document text
    • http://bptramptour.pl/files/file/94017128229.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/bamuwemepuselisove.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b680964856c488e18e18a87a861cf874/66411816541.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/89241977318.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/vigudigibam.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/mdpe4lr5b0k81m6nhmg0ktn114/fedevejoxofej.pdfIn PDF document text
    • https://chp-travel.ir/data/file/96894379603.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/280805107542.pdfIn PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/26703363946.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/vemekegemejunuza.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608701e76234d---21206380999.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160824b9c29b5a---zejojitevuvogasofupulakan.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/84908692262.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf0a9cfd0a---99357239359.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/64162873785.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a4c094f68---jovez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=two+way+frequency+table+worksheet+with+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE367 16624 bytes
SHA-256: 5547dcf49ff9b5d87f3d8da746881245d47819ba2ebd2b09c6eb5fcfd7eb74e7
font_01_sfnt_off00010eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C2 11072 bytes
SHA-256: 8c50b89139d965f1290a409384ab3e6f42fd99c8e605d98d8fffab52efc9e2bd