MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file contains numerous external links, with a significant portion pointing to SEO redirectors. The primary lure appears to be a 'Shapes of covalent molecules worksheet', which is likely a pretext to drive users to malicious sites. The presence of ML and ClamAV detections, along with the heuristic 'PDF_SEO_LINK_FARM', strongly indicates malicious intent, likely for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9994
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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=shapes+of+covalent+molecules+worksheet PDF link annotation
- https://s3.amazonaws.com/falejogajir/philips_norelco_beard_trimmer_series_5000_bt5511_49_review.pdfIn PDF document text
- http://ributufukepun.66ghz.com/ac_joint_injury_exercises.pdfIn PDF document text
- https://s3.amazonaws.com/pasawexawinogad/piano_sheet_music_leonard_cohen_hallelujah.pdfIn PDF document text
- http://circleshtang.xyz/sundari_kannal_oru_sethi_song_downloadigcxm.pdfIn PDF document text
- https://wipolupenigikof.weebly.com/uploads/1/3/2/7/132712614/a158f8dcd5646.pdfIn PDF document text
- https://s3.amazonaws.com/fedufiporara/ripanawemepatogi.pdfIn PDF document text
- http://salleapp.xyz/7576788696g2f46.pdfIn PDF document text
- https://s3.amazonaws.com/kovozenamofox/tatevujajadame.pdfIn PDF document text
- http://bavewemelemare.iblogger.org/dukedutuzojomin.pdfIn PDF document text
- http://tumuduwaju.mypressonline.com/97497389768.pdfIn PDF document text
- http://fesotisifofil.mygamesonline.org/pdf_split_and_merge_basic_download_free.pdfIn PDF document text
- https://s3.amazonaws.com/dukajevo/bsc_bed_exam_form_2019_rajasthan.pdfIn PDF document text
- https://s3.amazonaws.com/tesotiwapax/22897860539.pdfIn PDF document text
- https://rewegabelera.weebly.com/uploads/1/3/5/3/135390500/fbff4.pdfIn PDF document text
- https://s3.amazonaws.com/vipuxafol/dizuverokijijegabukebepex.pdfIn PDF document text
- http://cherrypimp.online/how_to_install_verizon_fios_wifi_extenderm77kv.pdfIn PDF document text
- http://gosoxegekiri.mywebcommunity.org/the_economist_february_23rd_2020.pdfIn PDF document text
- http://kipokefurur.mygamesonline.org/applied_research_vs_basic_research.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
- http://xenukelo.rf.gd/how_to_use_training_shock_collar.pdfIn PDF document text
- http://tewenusewokux.rf.gd/algorithme_les_tableaux_cours.pdfIn PDF document text
- http://milatosokalazer.epizy.com/rotovizugepabidaxenose.pdfIn PDF document text
- http://nukilaba.myartsonline.com/60422885979.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_off0000dc93.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDC93 | 5408 bytes |
SHA-256: a474b5d52b0c00663055a1ca231c7bc9d653b7239e932af76447e6eeae1606e4 |
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font_01_sfnt_off0000eedf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEEDF | 10840 bytes |
SHA-256: a3bb7bff19f726acacac3f4a3b94a260defc97cf058236380c0c1a062fd3e10a |
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font_02_sfnt_off000113f0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x113F0 | 4324 bytes |
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361 |
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