PDF malware analysis — malicious · be1578f8b88c75c5

MALICIOUS

PDF

76.6 KB Created: 2021-05-23 09:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 0b1b5ad5ed1f9449e0bac4ee04e84324 SHA-1: 2b54c92260ed75bd2c47e8a5f82221981938035b SHA-256: be1578f8b88c75c5765b5b789c905d30e596808be32b2069435f41773f498801

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure, disguised as a free download for a Hindi typing book. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a strong likelihood of malicious intent, likely to lead users to phishing or malware sites. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://dafemum.ru/strik?utm_term=mangal+font+hindi+typing+book+pdf+free+download In PDF document text
- https://xeludopoveju.weebly.com/uploads/1/3/4/5/134528604/tududapidolitu_varanijisudur_posagigi.pdfIn PDF document text
- https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/25936.pdfIn PDF document text
- https://faporipito.weebly.com/uploads/1/3/4/6/134600592/woruvikom_pebijipasov_jenegelolupa.pdfIn PDF document text
- https://bipewajebij.weebly.com/uploads/1/3/2/7/132740639/kamozuje.pdfIn PDF document text
- https://fanivimijebi.weebly.com/uploads/1/3/4/5/134594820/166f43a3.pdfIn PDF document text
- https://tikigafose.weebly.com/uploads/1/3/0/8/130874564/5337633.pdfIn PDF document text
- https://zunovuxosuseso.weebly.com/uploads/1/3/4/4/134497136/1156360.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/salosibejodod/realtek_hd_audio_manager_equalizer_missing_windows_10.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bff03cbf-5f9c-478c-9738-6be91dfa9d12/chemistry_12_reaction_mechanism_worksheet.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5a775406-2ac8-4975-965a-f5d1c6bc7074/what_genre_are_the_percy_jackson_books.pdfIn PDF document text
- https://s3.amazonaws.com/dukavunivifa/vapetukelexoman.pdfIn PDF document text
- https://s3.amazonaws.com/betefowubevat/brother_p-touch_2030_label_maker_user_manual.pdfIn PDF document text
- https://s3.amazonaws.com/povelenavuviw/99894626775.pdfIn PDF document text
- https://s3.amazonaws.com/zunaporam/spanish_alphabet_pronunciation_chart.pdfIn PDF document text
- https://s3.amazonaws.com/fadadedezeker/gurirokezamivepigato.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1a0dba15-2d47-4df6-886b-239a0f162d9f/semojawovulafomepog.pdfIn PDF document text
- https://s3.amazonaws.com/nunakixuma/2978914969.pdfIn PDF document text
- https://s3.amazonaws.com/mefadedosuw/joking_hazard_2_player_rules.pdfIn PDF document text
- https://s3.amazonaws.com/xefejevife/platform_7_louise_doughty_review.pdfIn PDF document text
- https://s3.amazonaws.com/viromibukoleliw/safety_movie_cast.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e897596f-ddc7-4498-a8fa-f1da84827d67/puludidamulunilorat.pdfIn PDF document text
- https://s3.amazonaws.com/tugumeb/41823449351.pdfIn PDF document text
- https://s3.amazonaws.com/puretulenuza/beauty_cam_for_windows_7.pdfIn PDF document text
- https://s3.amazonaws.com/sixenogafopoj/poxidezunago.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e81c1a3-1e29-49e3-b76a-e481bc31e46c/sermones_para_jovenes_adventistas_power_point.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_off0000e97f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE97F	5528 bytes
SHA-256: `6c991ee26b32f4343bb16f8914863dce855c83ebcc1775a0cd36fb35b1c9bcdf`
`font_01_sfnt_off0000fc67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC67	11404 bytes
SHA-256: `a0ceb2db7afa56ec7e57df99746517c3df34c2dff834113d8fc3ca31738f2524`

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