Malicious PDF — malware analysis report

Static analysis result for SHA-256 2974453b2ad2a077…

MALICIOUS

PDF

78.9 KB Created: 2021-06-25 23:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53162803be5395cdb6aa2adfa5b306bf SHA-1: 84ac71fdb89cc94c695cf4cd6f2e50eacd0aea52 SHA-256: 2974453b2ad2a077629a8747e486cd08e345d449b7ca3b34d2d7511328929239
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan. The document contains a link farm pointing to compromised WordPress uploads and other unknown domains, suggesting it's part of a phishing campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072564c290af---92076693361.pdf
    • http://altelaw.com/uploads/image/file/53529141087.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/irj8k4b4cfvbmrdt5qn4klrale/ganiziduluw.pdf
    • http://murasakijr.com/uploads/files/82790839651.pdf
    • https://strategieb2b.com/userfiles/file/litep.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/ca85c439d3c102449ba58852a0dd943f/73959931883.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a411d29ded6---90288789244.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/f1cddadfdbcef0f7838618a63ef063c9/vupafo.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/pm4p6skp4576712btujnabiao8/kiwun.pdf
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/2999793641.pdf
    • http://unesco-mediain.cz/fckfiles/file/92618454312.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/nbj6blmqvgh87fhshm1n7pnsjf/peladuwugonaduf.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db4df14e7a---mutujen.pdf
    • https://alatheir.com/atheirwsfiles/file/87833077570.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/2lkkn3eai4p0ktcc926fq3ipfb/52606945167.pdf
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/33767126287.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606c980a8573e---49719050781.pdf
    • http://daoltrading.com/userData/board/file/kuresitemofefokoge.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ei69jjlcvud47rldlpichj57gr/98887438484.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/5d8dc531100727aad14c887f8b7b6ba4/76618667413.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/714r9m6eq4pfbe1rdenlt9jua0/45420870721.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608241513e3b7---jadezofajigutixuro.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=public+water+supply+district+6
    • 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_off0000cdc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC8 16792 bytes
font_01_sfnt_off0000e5df.bin
21fd2765385c0d5c6f002fffc918ab854f134ace4c5586aa3af955e12fd81f02
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 10892 bytes
font_02_sfnt_off0000ff16.bin
cced85c8126919cb08e9610ab4dd0fcf1fb2686475988796fb473167c2e3dfd9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 17312 bytes