Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1bc5fa5a433adf7…

MALICIOUS

PDF

213.9 KB Created: 2021-07-31 13:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a9ba52feb3c2d2b0e93632513053268f SHA-1: 54ee003bcf35b486d6a4d311bd89cfd09d6861e3 SHA-256: c1bc5fa5a433adf768d7f75bdfc8f55989fc38750ac0f35bd05a7f57f28b0a5e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a link farm pointing to compromised CMS upload storage, specifically a PDF file, suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to download further payloads or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607979e36300c---53029370089.pdf In PDF document text
    • http://mgocsm.in/userfiles/file/refesarafuxaturevugab.pdfIn PDF document text
    • https://arerp.kr/data/file///rafuvofilenojozujul.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/q2kmkrgqktt702fvaugj2d7481/mofavuruvuvatapimifiwuzo.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/favinomo.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a29228741---65839309207.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608013d9bea0b---vapenebotaw.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/83429131934.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/67843267089.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/0b6f1a223e3f860be9bd2a8f3a5ffd4a/xerixenorugutib.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/24341204502.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/26539164717.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/93330320255.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/0sbjp1gu0smkue3aci45tc5tdp/vuvimaze.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba088825a67---fifubudulo.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608305c0c96a2---mexusota.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a07bcb016c4---kinaxomemeli.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/nubotovedakepumedu.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/dizofizusibu.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/74de6e4cacfa4f1837e67a5f98f503b0/lekanebiripoguba.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b3af1450b---mabexu.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/napenojodibasufowu.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/ec839cfc6d362c7043d62a978a38745b/25342631069.pdfIn PDF document text
    • https://vientangluc.com/upload/files/14852010550.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/02e3df4597d8ff8fdfdcdc7d6bd71d96/luzizesitozonemizedipixa.pdfIn PDF document text
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/wofiwatinewonozapesuruso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=i+saw+her+standing+there+tab+pdfPDF 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_off0002ea86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00030298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30298 17816 bytes
SHA-256: 8527122a5bff4b7f84a885296adba4770a1b92fd1a7ad21ebcdfec853b7520d5
font_02_sfnt_off000330a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x330A9 10788 bytes
SHA-256: 741d4a94b511f01441b7fbe53c4283a12895bd02f64040237b522a9039b6374f

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