PDF malware analysis — malicious · b5402eb62d16336d

MALICIOUS

PDF

80.5 KB Created: 2021-03-16 17:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 999596f6d3ba34cf4521e0f365a7cef9 SHA-1: e0be3590cf4b66727f89f510db6835515e8060f2 SHA-256: b5402eb62d16336dba1a45ad4481e12d53b0962dee49181d08a5e0562bacfa5a

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Astrology books in marathi pdf free'. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://vilenefex.ru/123?utm_term=astrology+books+in+marathi+pdf+free PDF link annotation
- https://suguturame.weebly.com/uploads/1/3/1/4/131438741/6e5bbb3306e7.pdfIn PDF document text
- https://nofiluwovix.weebly.com/uploads/1/3/0/7/130739726/rabisa.pdfIn PDF document text
- http://winoorama.website/71422693110tgypw.pdfIn PDF document text
- http://itasda.online/1249932143431eu4.pdfIn PDF document text
- http://bibivire.mygamesonline.org/kevaxejad.pdfIn PDF document text
- https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/1282f6.pdfIn PDF document text
- http://poxexududojal.66ghz.com/commandos_2_vollversion_kostenlos.pdfIn PDF document text
- http://debopuforu.22web.org/fabarud.pdfIn PDF document text
- http://lisolu.org/zezezegqvv8.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/40d59a7f-530b-402e-9047-50a43c4363d7/39246981031.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7a2de05f-c151-47dc-88da-a974a5d5794d/the_vegetarian_butcher_nuggets_test.pdfIn PDF document text
- http://repazof.rf.gd/82542192993.pdfIn PDF document text
- http://winupenelipumo.epizy.com/39934036639.pdfIn PDF document text
- http://rowisumemosil.rf.gd/civil_war_meme_template.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8facb155-2024-4f17-a0be-7c2463a3154c/xukajimumitekumikep.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a549b412-5f49-4b29-b3fe-eff5916b69a1/fudimeva.pdfIn PDF document text
- http://piwakitidi.onlinewebshop.net/41817720884.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/74b8996c-aea5-48e0-8ca5-ec4bae5c3bbe/best_python_tutorial_for_beginners_quora.pdfIn PDF document text
- http://vobununebufipu.rf.gd/baji_band_song_mp3_download_jayasrilanka.pdfIn PDF document text
- http://fuverojipu.rf.gd/33570633687.pdfIn PDF document text
- http://petojijoxura.onlinewebshop.net/why_do_karst_topography_only_exist_in_some_geographic_locations.pdfIn PDF document text
- http://xatudoxi.epizy.com/lolujamulezamunepomik.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_off0000f36d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF36D	5748 bytes
SHA-256: `c2848290a8a6a008308f1a796434edc9d03cc6b646bb0f44c106fae269d25d71`
`font_01_sfnt_off000106d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106D0	2252 bytes
SHA-256: `7accecb880c2b0fed565a62c5cae8b27c20057ab4a355afeda0aeb37332f7926`
`font_02_sfnt_off00011039.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11039	10536 bytes
SHA-256: `f700343085c65b1436e73db20a4c5e42c89f5d971efa51e33954b13b1785f100`

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