Malicious PDF — malware analysis report

Static analysis result for SHA-256 12fb5c1606ef01e0…

MALICIOUS

PDF

86.5 KB Created: 2021-07-26 14:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f94fb9cd2c0ef8d485f02b4c3052f28 SHA-1: cd2e66273c629464ef4c99e97adbc02b1ca766c2 SHA-256: 12fb5c1606ef01e0db80fbf81e07a1e7f7325de77baf36c6cccd0d15960179d3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress sites, designed to lure users to external content. The document body is heavily obfuscated, but the presence of link farms and the advance-fee scam heuristic strongly suggest the intent is to trick users into engaging with malicious content for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987e4651447---61078694010.pdf
    • https://laser123.com/geektic/files/ravitejogabu.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/o5c6mnk2oc30erjapg0sjf41lq/27787866684.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/rd07037dg932mef2kc3fnhrhu3/xifenanuvunalopizipo.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f385ce159---luwojejuz.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/d976430c57933e813bc17d6188e08715/vuvurunazol.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/4u94crfk3ktks6cpjuhif4vto3/limurugirewedajofitosug.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f664a24f82---nidizudugeditinutu.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/98843568950.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/k67utsh56hkh5u65c5m2cudehd/nalunivenuvebikusuris.pdf
    • https://dreamscapes.ca/dream_scapes/userfiles/files/83332185894.pdf
    • http://prmakeup.com/Image/files/72363411975.pdf
    • http://ottotech.center/userfiles/file/31484580403.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0286700b36---23008225251.pdf
    • http://chouchoudauphongongtay.com/upload/ck/files/96077853286.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/8bfcdbc920ab81499adb525d8848effc/63460056884.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b52bb014f---83999159536.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/15727de4cee9e5bd8345b02447a14f69/vevoxubol.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31741c97f3---papab.pdf
    • https://aksusu.com/upload/files/64777073373.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160faac9c8b8ce---46617862658.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/j8sqabbvl8cnfo1609e9t00025/fimasepelugur.pdf
    • https://birudongker.com/contents//files/24828473204.pdf
    • https://diarch.in/WYSIWYGImage/file/defotuva.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-12/20210512000429550641.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/hfvn3rcvvkgth8empqelsdfnsl/21432409671.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+do+i+give+temporary+guardianship
    • 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_off0000eecf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 16792 bytes
font_01_sfnt_off000106e6.bin
3b7d23d9c04a58f1a5b10db3453255f8690909ba8ce7d0bde01bf88aea58b42d
pdf-font-stream PDF embedded font (sfnt) at offset 0x106E6 11152 bytes
font_02_sfnt_off0001208e.bin
a6876bb5764f967d387e620df6c31e5a9b567fe847944b01e349b9a0ee62b441
pdf-font-stream PDF embedded font (sfnt) at offset 0x1208E 16640 bytes