PDF malware analysis — malicious · 89a14422c6d62de5

MALICIOUS

PDF

82.5 KB Created: 2021-07-31 12:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 80dc0fec00bb288f61cc24782d51b4e3 SHA-1: 69ec926d21ea7c41bdca97bb80f46a1d3f1667b6 SHA-256: 89a14422c6d62de57a58a7abf444fd9e750d7111dcc1bd5f201960d86e2aea20

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9925

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 https://nomylo.ru/uplcv?utm_term=how+many+calories+in+a+large+domino%27s+pizza%EF%BF%BC PDF link annotation
- https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/gqk68vfpiqea9q0ovdqjcb3hs7/tusirukexovotinelebaram.pdfIn PDF document text
- http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607df1f19b9f7---69334183479.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1969aa1cef3859330143c8f305d88274/tupokudeliwuzifakexobudo.pdfIn PDF document text
- http://harissarantis.com/userfiles/files/35809384038.pdfIn PDF document text
- https://eastmanllc.net/ckfinder/userfiles/files/63989199686.pdfIn PDF document text
- http://ccforum.kr/uploads/file/1623395087.pdfIn PDF document text
- https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f2b38d002b89f9ce3337725f0e899b0b/9505089965.pdfIn PDF document text
- http://bahtiyardishekimi.com/fckfiles/file/maxupalesaguwos.pdfIn PDF document text
- https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/ci9ls89c77s5damnjm43goig06/fapavuvaxegesi.pdfIn PDF document text
- http://allycatering.com/userfiles/fezojufedeluxesiw.pdfIn PDF document text
- http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070186d9b420---guzipu.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607239721e110---difusoditabu.pdfIn PDF document text
- http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609569954318a---93189151968.pdfIn PDF document text
- http://fullcolorspandoeken.nl/userfiles/file/80435659043.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b67f5fdd3---45288735430.pdfIn PDF document text
- http://box8websites.com/ckfinder/userfiles/files/vukafikigovefige.pdfIn PDF document text
- http://ridendo.cz/files/file/nunoxulup.pdfIn PDF document text
- https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/7adhfo1o0uqaljaee7tiro1fe1/65781825816.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/128b292e31e950ad7f7ad87d84757dd9/74449899455.pdfIn PDF document text
- https://businessservicesuk.com/userfiles/file/21899981357.pdfIn PDF document text
- https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/6j6geee3uj8i7v6bkhceo2ut64/pegipowasizem.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b91a86391---wogapufakiki.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e87dea0bf6---50590318602.pdfIn PDF document text
- https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/nqkirokt6o144bvjk458ir6ukc/76870002200.pdfIn PDF document text
- https://ldcpc.com/ckfinder/userfiles/files/figitapewid.pdfIn PDF document text
- http://degeninhotel.ru/admin/ckfinder/userfiles/files/gufefojava.pdfIn PDF document text
- 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_off0000dca8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCA8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f4ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4BA	16284 bytes
SHA-256: `7fe90f9ef9c6152614990d5ef0ee1a40bbd9b0319ebdf60b7422be83f6cee358`
`font_02_sfnt_off00011ede.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11EDE	11048 bytes
SHA-256: `f3d09d94cf747611eb152cf353ac1ed92664d0824e61f95fd6d5318f03c98f91`

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