Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd3cdc7ff2ee896…

MALICIOUS

PDF

95.6 KB Created: 2021-06-27 23:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 399322d53da81f5cb82c41f8dcc999d1 SHA-1: 452b36896041aa550abf42626ed7052bd9bd7379 SHA-256: bcd3cdc7ff2ee8966d4fb0a7007150adb888aa2be596548008a7194892824c06
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is a link farm on compromised CMS uploads, likely serving as a lure for an advance-fee scam. The document body is heavily obfuscated and unreadable, but the heuristics strongly suggest a phishing or scamming attempt. The embedded URLs point to various PDF files hosted on potentially compromised websites, indicating a distribution mechanism for the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac253a7848---dodifusexizekafezosisej.pdf
    • https://alshaabcoop.com/userfiles/file/90921761921.pdf
    • http://dongxuyen.org/upload/files/29582791517.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/114b7cd387e61622c5a03870550cfacd/sifodebuwudijizo.pdf
    • http://naturallabs.fr/userfiles/file/xudugokose.pdf
    • http://andlupa.com/userfiles/file/73310524554.pdf
    • https://yepsell.com/userfiles/files/67385269847.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac77593a731---87830406961.pdf
    • https://rybczewice.pl/userfiles/file/kibafetowumumajabawomefo.pdf
    • https://supermagnum-bg.com/userfiles/file/1233856481.pdf
    • http://mawaevents.com/uploads/file/80031339310.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/14d46c96f16770351fd46818a8fcea91/96622098218.pdf
    • https://hospvetcentral.pt/site/upload/file/kufenomepugivoli.pdf
    • http://househouse.it/userfiles/files/24228567625.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609683619e220---xupaberaxapeb.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2d3ee87a6---99988554406.pdf
    • http://hungthanhauto.com/luutru/files/75279479901.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/4c47adbbd720ce1406dd2608de9a8a4e/79219806998.pdf
    • http://skogsformedling.se/bilder_umeny/File/tefegakegaw.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/h4sknob5h3u6695adl3344mue1/wabitekunawofinetilun.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/3aghnrvau52l3b6dl7bjp4mcru/gerusewerabatajogutu.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609623c7740d9---vosasisa.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f387648556---17471996258.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/lna60e4ec3jivmrl1lgpqiaghl/genalozoni.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c708ea57170---xevufozisakewipuzu.pdf
    • http://lapenya.cat/imgjovesnaves/file/40742467116.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a8faeb344---minag.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=renewing+of+the+mind+verse
    • 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_off00010fd2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD2 16792 bytes
font_01_sfnt_off000127e9.bin
7333420c6069d6d2698c56def171013a7d1cac4cc413bbbe3b6c75d14e70cffd
pdf-font-stream PDF embedded font (sfnt) at offset 0x127E9 10788 bytes
font_02_sfnt_off00014069.bin
d9814a643547459c4fec1d829beefac09573563dfe13029240f533ecfa1fa571
pdf-font-stream PDF embedded font (sfnt) at offset 0x14069 18204 bytes