PDF malware analysis — malicious · d1027ae4d7374744

MALICIOUS

PDF

94.4 KB Created: 2021-07-01 20:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 2a82002e98ba44f6a5f2e1422e290122 SHA-1: 7e50c74ea651f3b1e5437a8542315863068f8a21 SHA-256: d1027ae4d73747443cc379cb5bba86f73efe2121a086a033ee4aee53ba1e029c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, which in turn host other PDF files. This structure suggests a link farm designed to distribute malicious content or lead users to phishing pages. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9806

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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/1607153c15cf5c---34819269321.pdf In PDF document text
- https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/07de3fb03f7eaa6d9ab232199ac1e453/gofuwugejozelugomumiwak.pdfIn PDF document text
- https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a584a736bb5---45900487623.pdfIn PDF document text
- https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/40041e603ff5b13bbff6da0b800d7c8f/tovagawufazoxalazis.pdfIn PDF document text
- https://myphi.biz/nbloom/fckuploads/file/jezojuxotemegajo.pdfIn PDF document text
- https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5290a9f44a---36972597342.pdfIn PDF document text
- https://onlinendttraining.net/files/15056347585.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ac0dcdc5d5a17d5664f0e80fad8da4d2/xujutegaxumo.pdfIn PDF document text
- http://jagatjyotischool.org/jagatjyotischool/userfiles/file/61414123011.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887edb8cbc5---1816779737.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/uneiimfqoo6oeso6gpis1idq0q/rolusomijis.pdfIn PDF document text
- http://www.drivingschool-brno.cz/files/files/silirotugumejilezuwari.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/4b31efc291bd5f95e4fdba34f92e22f5/33868510810.pdfIn PDF document text
- https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4kvlvjo28p5b32k8p8ni3mpb23/besaterenokagetefa.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e68b3b635b---68925050016.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08534b18ef---wuxagadewuja.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/dljo8cnjlh7adecas5ueuv6j74/17041320753.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16099bbd477091---begadavupakofodig.pdfIn PDF document text
- http://www.bash.cl/media/file/73154721761.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa07443ce9---tupejegezenetipe.pdfIn PDF document text
- http://onlinepravenconsultant.com/uploads/wysiwyg/files/gexak.pdfIn PDF document text
- http://nadiadsa.org/userfiles/file/zewisigudojuwodotitav.pdfIn PDF document text
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/a4e1rlknjt28lr6r4goc1ffkl3/34599036299.pdfIn PDF document text
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc68d68d41---9797738268.pdfIn PDF document text
- https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/rq4sh72ja5f6v60dp8g3gd6l7g/3782207964.pdfIn PDF document text
- https://onlineadda.net/ckfinder/userfiles/files/munabuzoxuli.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/1bbka3k4nku1hbjb2nqfrvmpfq/50693220404.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=female+and+male+blue+jaysPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off00010d50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D50	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012567.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12567	10460 bytes
SHA-256: `f8af8b795b19a9a0e6928fe40628d5e6edab34255f285c974b4041c43d8a21c9`
`font_02_sfnt_off00013d11.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D11	17816 bytes
SHA-256: `82c1937bf8377d4fefe33f5730f64edbae112f92623cf1834980b9ac2e712509`

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