PDF malware analysis — malicious · 2c6c4b7990331756

MALICIOUS

PDF

82.7 KB Created: 2021-05-26 05:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07

MD5: 01abdf86c776914ffc8bba7f03a16b76 SHA-1: 80778360ee606208f95d455315a569b184bea238 SHA-256: 2c6c4b79903317560e9bf14426ac65a9f49348fd060c64458503880b4cb64ac3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous external links, many of which are hosted on domains commonly associated with SEO link farms and phishing. The document body, though heavily obfuscated, appears to be a lure related to "photosynthesis what's in a leaf pogil pdf", directing users to potentially malicious websites. The presence of multiple external PDF links and the ML classifier flagging strongly suggest a phishing or malicious content delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://golowaki.ru/wb?keyword=photosynthesis%20what PDF link annotation
- https://cdn-cms.f-static.net/uploads/4493549/normal_604670ceaa85f.pdfIn PDF document text
- https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/tujuzuji.pdfIn PDF document text
- https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/7491629.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413474/normal_60040f74e7ad8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451350/normal_60057f5d5806b.pdfIn PDF document text
- https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/revowov.pdfIn PDF document text
- https://rulesamafov.weebly.com/uploads/1/3/4/7/134768786/4918895.pdfIn PDF document text
- https://riwinuwozobama.weebly.com/uploads/1/3/4/8/134868589/dinarevinubazadutex.pdfIn PDF document text
- https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/313972.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486963/normal_606cc9c2f06d9.pdfIn PDF document text
- https://dodapufil.weebly.com/uploads/1/3/0/8/130813701/7872229.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454040/normal_5fd641414dda9.pdfIn PDF document text
- https://tuxazapewim.weebly.com/uploads/1/3/4/8/134846749/tazolunuvulorowewade.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/kotenu/classic_wow_hunter_guide_icy_veins.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/395099de-e617-40fa-9145-7344b9fe41c1/96365988314.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f3933b94-5062-46ec-8b6e-e077655b2f3a/bevajeguzipefuliliguliz.pdfIn PDF document text
- https://s3.amazonaws.com/tumuzu/20528461769.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4881f3b4-63a1-41a2-9622-9655ddfee6cc/what_is_the_dream_factory.pdfIn PDF document text
- https://s3.amazonaws.com/bidurudilidujug/how_to_empty_a_keurig_k40.pdfIn PDF document text
- https://s3.amazonaws.com/ziwuvijevo/port_aransas_deep_sea_fishing_report.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6039f1ed-0a07-4fbf-b746-b5a3dd08e9b2/59525072543.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/26977b21-b25a-425d-8c37-af6b6baa012e/war_of_the_worlds_2021_cardiff.pdfIn PDF document text
- https://s3.amazonaws.com/xefejevife/improve_self_confidence.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://scripts.sil.org/OFLIn PDF document text
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f4f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4F3	5436 bytes
SHA-256: `1874e1fd7695b6b76adff39e3ef23385da0ad950af3b139bb5e9c59bb276dd2a`
`font_01_sfnt_off00010757.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10757	6168 bytes
SHA-256: `96f6da995762294ea3a4027012fe6abcaa176fb300c6cb737c1f5ddadc5a0795`
`font_02_sfnt_off0001163d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1163D	10776 bytes
SHA-256: `fc838ee0f92d48ef77af0f5db9f05bba879a271a0e42ac4dff7e2943a33b6b90`

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