PDF malware analysis — malicious · ad66536110fdc796

MALICIOUS

PDF

67.3 KB Created: 2021-03-22 13:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 7db3c79209c750d9f6e792c3009c165d SHA-1: ba84257b0da86511bb16c683ca8e4e9b68f121c0 SHA-256: ad66536110fdc7960301e4f2c7a19939b3d533795ff23b4b314c56ab99149ded

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO abuse tactic. The presence of external URIs and the PDF_SEO_LINK_FARM heuristic strongly indicate an attempt to redirect users to potentially harmful content or facilitate further malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
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://maypoin.ru/aws?utm_term=titulos+de+credito+proz PDF link annotation
- http://vuwefedope.sportsontheweb.net/20109777877.pdfIn PDF document text
- https://cdn.sqhk.co/bogulevim/2giHG9y/survival_earth_warframe.pdfIn PDF document text
- http://pazujiz.mygamesonline.org/zevusawaluremox.pdfIn PDF document text
- https://cdn.sqhk.co/dunuxorigu/v1gjEjb/rijave.pdfIn PDF document text
- https://cdn.sqhk.co/noneniwetav/dcfhXih/80869938053.pdfIn PDF document text
- https://cdn.sqhk.co/berazanoga/jcTDJja/crystal_reports_for_net_framework_4._0.pdfIn PDF document text
- https://cdn.sqhk.co/rasepotobami/hhdigjh/how_do_i_cancel_my_etisalat_internet_account.pdfIn PDF document text
- http://tesupelaj.sportsontheweb.net/34316590334.pdfIn PDF document text
- https://cdn.sqhk.co/tuponapalab/6G0Qhhc/do_crows_attack_and_eat_other_birds.pdfIn PDF document text
- https://cdn.sqhk.co/tudobele/hMQjf56/bikonixoduzapipen.pdfIn PDF document text
- https://cdn.sqhk.co/zaperarori/dqiahaJ/49469875539.pdfIn PDF document text
- https://cdn.sqhk.co/tinipuded/8Dgiljd/xonepoza.pdfIn PDF document text
- https://cdn.sqhk.co/gotirawuz/IqJOicx/nokaminuvilozarosi.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/wovedukevikov/cacaoweb_windows_7.pdfIn PDF document text
- https://s3.amazonaws.com/gotitibekovi/saudi_aramco_logo.pdfIn PDF document text
- https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_2f48b970a60f48ccad8903118467bdf3.pdf?index=trueIn PDF document text
- https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_458c49337e5440bebbcd74dbd643eaa0.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/bupijila/84107440996.pdfIn PDF document text
- https://s3.amazonaws.com/gimufesajo/how_to_put_on_the_armor_of_god_by_mike_bennett.pdfIn PDF document text
- https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_f449cc554b0b4e009be27c531ed6f415.pdf?index=trueIn PDF document text
- https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_dd7ecd1523244d67b3335a96e828d56b.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/voxulija/calendar_2020_word_template.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ce96.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE96	4856 bytes
SHA-256: `3b86fbdf0d63c62b27a0a5c65c866aa7e101c5b1ac4d957935aeeb0e80e25e0a`
`font_01_sfnt_off0000df31.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF31	9584 bytes
SHA-256: `0ab49bd5394f41147f2998c9a2149abaa5a4adff45867c0b75efc69459bc971d`

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