PDF malware analysis — malicious · d2aea21f055ff1a1

MALICIOUS

PDF

82.4 KB Created: 2021-03-20 07:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: ead64621291622f6ad1b8ea77999fcbf SHA-1: c5482cdfe2f77b35faac3a5d9d9ac95f7985256f SHA-256: d2aea21f055ff1a1e08cbfe6159902bd6675352b4b276bb5d573adbced5568a8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are to other PDFs, indicating a link farm for SEO manipulation. The primary malicious URL identified is 'https://maypoin.ru/123?utm_term=accretionary+prism+formation'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content or phishing sites.

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://maypoin.ru/123?utm_term=accretionary+prism+formation PDF link annotation
- https://cdn.sqhk.co/pazakazagoz/Dsihegc/87894788118.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486981/normal_5fc85ca81f790.pdfIn PDF document text
- https://cdn.sqhk.co/sixitigoxeto/VrigNYH/nopujipilabolufa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484605/normal_5ffa4d8cc2c94.pdfIn PDF document text
- https://wujadagepixiv.weebly.com/uploads/1/3/1/8/131856877/ruvabo-nufovedebipidof-mojisir.pdfIn PDF document text
- https://cdn.sqhk.co/wixexozesila/nhjjfhc/leatherman_multi_tool_sale.pdfIn PDF document text
- https://cdn.sqhk.co/jufulezamuko/pHhbMgF/85367369951.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500187/normal_5fe5fee1e7c07.pdfIn PDF document text
- https://cdn.sqhk.co/balekunu/SjWDtrl/64317551767.pdfIn PDF document text
- https://cdn.sqhk.co/kosifodalab/jinhcie/31453022207.pdfIn PDF document text
- https://cdn.sqhk.co/sejixikerut/12kji8K/telifowobagoz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424013/normal_602487cfa714a.pdfIn PDF document text
- https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/0eb95f8589.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/58f2e86f-d51f-45cc-a565-eb3d19eee9be/what_does_apple_airport_express_do.pdfIn PDF document text
- https://s3.amazonaws.com/tenunud/xovona.pdfIn PDF document text
- https://s3.amazonaws.com/fizufapu/4993773683.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/25d78e44-00c0-4039-ba17-4b4ee315c555/how_to_remove_lg_air_conditioner_cover.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/31d2daf1-3ad6-4064-a948-bedb544e9e29/the_far_side_comics_age_appropriate.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/65adab12-184f-4e84-8ba1-aac1981f62f5/7561786113.pdfIn PDF document text
- https://s3.amazonaws.com/gorajikunobixi/43417396984.pdfIn PDF document text
- https://s3.amazonaws.com/wefadep/jizunawam.pdfIn PDF document text
- https://s3.amazonaws.com/sosupejuxofedo/panimudoreropeliwotobino.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e08c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE08C	5008 bytes
SHA-256: `67aa95df19e71186a11fab989ef0f92a735b858773a02f88f028087ff6d7b9e1`
`font_01_sfnt_off0000f172.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF172	11188 bytes
SHA-256: `840ae0f4209450b7a435eb2ffe11e3b40312e43d01fa9d2bbde18bd92e6297f6`
`font_02_sfnt_off00011728.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11728	16148 bytes
SHA-256: `49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648`
`font_03_sfnt_off00012c1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C1E	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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