Malicious PDF — malware analysis report

Static analysis result for SHA-256 32705dd282fc073f…

MALICIOUS

PDF

84.3 KB Created: 2021-09-03 00:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4bd0ec79dcfce4f3dc35c1e5a51119a9 SHA-1: a1d44f205b49951cd5f0a35e1cd639d6488f68fe SHA-256: 32705dd282fc073f2b351b184c44a357f566209768c44ab7f47bbc286d83e893
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. The heuristics indicate it functions as a link farm, with several URLs pointing to compromised CMS upload directories, and it explicitly instructs the user regarding a password-protected archive. This suggests a phishing or social engineering attack designed to trick users into downloading and decrypting a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b8579e87db3---48376347845.pdf In PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/40648396254.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/1629298319555418850.pdfIn PDF document text
    • https://artenika.pl/fck/file/34479594872.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/winojatuzomudile.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/13b5569ffd093cd0f9a684b59f084821/waravimafofefedaduvubun.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/15587951920.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/57231648243.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/xitaxelamuraron.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/28163106628.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/kapabumot.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16123717311978---ganujapejedenu.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/jvms6eti7rd68bri31n15rmqd3/74239681858.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/gesurunoxosafum.pdfIn PDF document text
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/dogejibivozobewajejebenif.pdfIn PDF document text
    • https://fobh.net/userfiles/files/ruwuvovamox.pdfIn PDF document text
    • https://cmoretv.com/userfiles/44905063016.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/20449556197.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/0dd6598c77b96eb1e95242b7bb698847/54270684119.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608311b18cd65---28552740783.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be40816cdd3---47570828915.pdfIn PDF document text
    • http://meskerjager.nl/media/files/zupixemibalavidow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+configure+tp+link+wifi+extender+manuallyPDF 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_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 17408 bytes
SHA-256: 62a0974ae744637e0885a0d578e84646c4a5c654012eeccecd745af6d4ca7f9f
font_02_sfnt_off00012908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12908 11280 bytes
SHA-256: 8be563fab111fbcbc8b7e15c024fb8b5681867e79eda6b7c8592d22300421a44

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