PDF malware analysis — malicious · 273a7f076a16b9e3

MALICIOUS

PDF

81.5 KB Created: 2021-03-05 16:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29

MD5: d7405c0f6d388e8f646ada123373b4e9 SHA-1: 964ef703fb1934e1de47134bcb2975921b0d70b1 SHA-256: 273a7f076a16b9e3dcf83a4c7c23c260875c0ee1f5a1df7517b30ac5140ec4a8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm designed to drive traffic to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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://bologen.ru/strik?utm_term=paint+by+numbers+with+frame+uk PDF link annotation
- https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/farawej.pdfIn PDF document text
- https://xisosisudotaju.weebly.com/uploads/1/3/0/7/130738948/7494058.pdfIn PDF document text
- https://juvumumirogo.weebly.com/uploads/1/3/5/3/135313675/xixaxawu-ripipidanob-powaro-pinadirobusudo.pdfIn PDF document text
- https://cdn.sqhk.co/tazifawixax/cja8hdv/popular_cute_cat_breeds_2019.pdfIn PDF document text
- https://pixasarajesuwov.weebly.com/uploads/1/3/4/6/134688766/dapema_xosenawazi.pdfIn PDF document text
- https://zitavumerut.weebly.com/uploads/1/3/4/4/134465292/lojifasolodex-zinipan.pdfIn PDF document text
- https://doxibizogo.weebly.com/uploads/1/3/4/8/134893922/1546555.pdfIn PDF document text
- https://cdn.sqhk.co/xafemepino/Quq5gjh/mytargets_archery_ios.pdfIn PDF document text
- https://lodonukatozusa.weebly.com/uploads/1/3/1/0/131070116/e1df273539a3b0.pdfIn PDF document text
- https://cdn.sqhk.co/nomitusibop/2jfifgh/nanog.pdfIn PDF document text
- https://dofixojibol.weebly.com/uploads/1/3/0/8/130874360/4bf6edd29561.pdfIn PDF document text
- https://cdn.sqhk.co/wanowofimaz/d2jcjGs/download_aplikasi_death_worm_free.pdfIn PDF document text
- https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/fidim.pdfIn PDF document text
- https://mubuwevuli.weebly.com/uploads/1/3/4/5/134528176/7968c8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/eedd880f-71dd-4e1e-b69a-c3187fb1eb4e/slaves_to_darkness_color_scheme.pdfIn PDF document text
- https://s3.amazonaws.com/fasudikek/70683239196.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/874681e7-c139-4791-bba8-fcacffa99887/fexizava.pdfIn PDF document text
- https://s3.amazonaws.com/fapaga/17548687904.pdfIn PDF document text
- https://s3.amazonaws.com/tonisefoteka/fugoxivagubebulur.pdfIn PDF document text
- https://s3.amazonaws.com/zarelusipofox/duditesavij.pdfIn PDF document text
- https://s3.amazonaws.com/jugobimuraje/night_sky_app_for_android.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ad9bcdde-d34e-4d4d-b935-634c7f630d3e/when_the_grizzlies_walked_upright.pdfIn PDF document text
- https://s3.amazonaws.com/nitizobuv/template_method_design_pattern_c_example.pdfIn PDF document text
- https://s3.amazonaws.com/nakuzafol/75909737289.pdfIn PDF document text
- https://s3.amazonaws.com/desekusoxi/raremaretupebamojulezebi.pdfIn PDF document text
- https://s3.amazonaws.com/vufupu/conjunctions_worksheet_6th_grade.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f422.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF422	3004 bytes
SHA-256: `2d2b02b66b10e6f65e8d4ba4b3936f36cbcc514932cd3fe31e1dbb06cbba07ba`
`font_01_sfnt_off0000fef2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEF2	5376 bytes
SHA-256: `444bbe87c215001f37d313ff4740b6a8dab367453aedb3550ff7ea03855ee839`
`font_02_sfnt_off00011126.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11126	10996 bytes
SHA-256: `421c2fb8db1eb011c45fe7e523ce39e9753e5cf9de74d1f1f8552b33ef99ef43`

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