Malicious PDF — malware analysis report

Static analysis result for SHA-256 beadcb30b385c34e…

MALICIOUS

PDF

76.8 KB Created: 2021-09-06 06:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 97cdef14c09f3f87ac0acc2e28a327d0 SHA-1: 3dfcc9eaf88d45cd73ffe4c8d837f7f100e160e8 SHA-256: beadcb30b385c34ebccb8b6806eb4dc068777509eb36c09d9eaa863a9e88a77e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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.
  • 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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102b1e2f0641---92448976867.pdf In PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f05bc5df6a---27756868539.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7d321b0c3---bememuvopesokimuribaxi.pdfIn PDF document text
    • http://teknis.it/userfiles/files/53722096212.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/rukivevaj.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/83632644636.pdfIn PDF document text
    • https://10fci.org/userfiles/file/tivuxiwadalejusotutorev.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/24425782023.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/xamixej.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/rivimor.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160de0a3f42cd0---84263780461.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cf5c94340---22115310245.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f664e736c8---74447038187.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/wijadobur.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160954f57c03ca---6503301073.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1629951965.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/kazitivexavebos.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/209a5358accdb7441368e186a2dc6a65/repefujaruwugikusekivi.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210707135602.pdfIn PDF document text
    • https://airshow-bg.com/file/lonopuparopijuxolepapuma.pdfIn PDF document text
    • http://quranday.org/userfiles/file/vepobazasidijosiwut.pdfIn PDF document text
    • http://bibikid.ru/upload/98108306807.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/2f1de93ef40db63ce2f7ce279aa5188e/98923195008.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/71213347413.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/mavomejo.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609829a42df84---nejoko.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/xupukapose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=dictyocaulus+viviparus+en+bovinos+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_off0000c388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC388 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9F 11036 bytes
SHA-256: b9ba49ff894f93e630e9bea3f39c5cfdcbdab3013f1d71655e47e054600dd176
font_02_sfnt_off0000f542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF542 18128 bytes
SHA-256: 7d9c80c561e9821c9d5ce4678c1f628ed7b33df0471fe73e803245220745a7f9

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