PDF malware analysis — malicious · c305b083f3a078f6

MALICIOUS

PDF

82.0 KB Created: 2021-03-21 22:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: de361f84487fd9de5674e9db05f23659 SHA-1: 7acc4241ad13b02762c3229fc81a58fa4e4a8fe1 SHA-256: c305b083f3a078f6b7a7c7a0482435c14c7ec46ed0bec601c86d5834bda84eea

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to S3 buckets, suggesting a link farm or SEO spam operation. One prominent URL, 'https://botokaw.ru/wix?keyword=life+without+education+quotes', is presented as a lure related to 'life without education quotes' and is also flagged as an SEO redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious or spam content, likely for phishing or ad revenue.

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://botokaw.ru/wix?keyword=life+without+education+quotes PDF link annotation
- http://newipufisatag.scienceontheweb.net/basic_civil_engineering_questions.pdfIn PDF document text
- https://gifuroromila.weebly.com/uploads/1/3/4/3/134377961/valibaxubefeguko.pdfIn PDF document text
- https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/3176646.pdfIn PDF document text
- https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/bigabuta_takomexojebij_wereve.pdfIn PDF document text
- https://cdn.sqhk.co/kojetovukufo/dgvvaBj/supukesuxizube.pdfIn PDF document text
- https://cdn.sqhk.co/jujegopenop/am8hhih/future_cargo_train_simulator_pro_2020_download.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/rutufokedizon/mopikemuxowub.pdfIn PDF document text
- https://s3.amazonaws.com/kefodek/how_to_buy_pharmaceutical_stock.pdfIn PDF document text
- https://s3.amazonaws.com/bisiku/vovutikapozemakid.pdfIn PDF document text
- https://s3.amazonaws.com/rekorewexidiwo/41930252994.pdfIn PDF document text
- https://s3.amazonaws.com/silubebebefuju/reddit_fantasy_football_draft_cheat_sheet_2019.pdfIn PDF document text
- https://s3.amazonaws.com/mesixadelomomo/bizataruziropasede.pdfIn PDF document text
- https://s3.amazonaws.com/neporezofov/la_campanella_piano_sheet_imslp.pdfIn PDF document text
- https://s3.amazonaws.com/pusori/adding_cinema_apk_to_roku.pdfIn PDF document text
- http://farovosodiwes.atwebpages.com/fademefuwupijarevigi.pdfIn PDF document text
- https://s3.amazonaws.com/musoxifuvitalo/bengali_poems_free_download.pdfIn PDF document text
- http://wugujub.onlinewebshop.net/fibijinurulimed.pdfIn PDF document text
- http://fatavetotujel.onlinewebshop.net/virtue_ethics.pdfIn PDF document text
- https://s3.amazonaws.com/zisulamisozoto/zawikojafubagolupamub.pdfIn PDF document text
- https://s3.amazonaws.com/womirofop/65883736833.pdfIn PDF document text
- https://s3.amazonaws.com/zagapaxa/nemuf.pdfIn PDF document text
- https://s3.amazonaws.com/sojenozap/temabaxiwawaxevi.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_off0001036e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1036E	5140 bytes
SHA-256: `29ba8e3631711e414ef467e82e142dd707ff5ce4a55e5217f7ade0b8c258deba`
`font_01_sfnt_off00011505.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11505	10400 bytes
SHA-256: `4ea544df0c92bdf6c1879749f50dcd123fa23cacb1d03a5d500a3c92032778d9`

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