PDF malware analysis — malicious · 770562857ce2a1dd

MALICIOUS

PDF

81.6 KB Created: 2021-09-06 09:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: ee7f5ef053c777de8a0f9b4280365edb SHA-1: 79c18495a860eacfa5c6dea7b1f5dc661513a1b6 SHA-256: 770562857ce2a1dd4db89009e5428e22151b8e9c4cb785be9f202fa7b9f2de13

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and link farms hosted on compromised WordPress sites and disposable domains, suggesting it's designed to redirect users to potentially malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, pointing to a tactic of using SEO poisoning and compromised infrastructure to distribute lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://queure.ru/uplcv?utm_term=sand+casting+defects+pdf PDF link annotation
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839ac9c7457---23484841988.pdfIn PDF document text
- http://cameranichietsu.com/luutru/files/duvitizabupagofuzeba.pdfIn PDF document text
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6aced6210---53364711335.pdfIn PDF document text
- http://esistore.be/userfiles/file/sebutudabutirusufo.pdfIn PDF document text
- http://kancelaria-perfect.pl/app/webroot/media/files/gozazekisemeregatefijob.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba17b77d183---tunuzunuvimivetofo.pdfIn PDF document text
- http://onlinemidias.com/ckfinder/userfiles/files/53538938691.pdfIn PDF document text
- https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718952a59d4---60712572094.pdfIn PDF document text
- https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb6f9505c68e5ba62b1f09ef30654462/23103779653.pdfIn PDF document text
- https://newtop-eg.com/userfiles/file/4093281440.pdfIn PDF document text
- https://szallas-karpatalja.hu/upload/99468381183.pdfIn PDF document text
- https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/j0htkisqg2k4rinr3lo4prrm33/85279681628.pdfIn PDF document text
- https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/c2c39908ad4a0b6a1204773553a1effb/rametugub.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89527df6e---2128300492.pdfIn PDF document text
- https://x-software.cz/data/file/82008314439.pdfIn PDF document text
- http://proxima-design.cz/files/file/pozefariwodi.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab46fc6ba88---dowobelifutukasa.pdfIn PDF document text
- https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/0201021643a64bb156e2c4e0bc46ead4/bijepenimakopeg.pdfIn PDF document text
- https://waroproject.com/file/pewivatijugetitovu.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/712e7484dbc0948caa83ab748b8b4641/tafovobusavux.pdfIn PDF document text
- http://alphabodysupplements.com/newerac2c/userfiles/file/watavekipival.pdfIn PDF document text
- https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/lniprhl8jcvplmf01hnukh9cbr/bidiwiwejopajogunexiwuwu.pdfIn PDF document text
- http://matstravel.ru/userfiles/file/punotejozizopamuxubitusol.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30dc3f0d05---3366399527.pdfIn PDF document text
- http://soc-in.com/data/media/files/15186367929.pdfIn PDF document text
- https://festival.bg/fckeditorfiles/file/sofubirovadami.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_off0000ddcf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDCF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f5e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5E1	16668 bytes
SHA-256: `c393855f83b95bb12b4e92107cf672bcdbce90802eb14b01bdb40b0170602fae`
`font_02_sfnt_off000120db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120DB	10604 bytes
SHA-256: `aec8898337bb29f28332301d53602261b57fd170c6ccfbcdfbd4930abc554d05`

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