PDF malware analysis — malicious · a2bcc2315e879908

MALICIOUS

PDF

78.6 KB Created: 2021-03-07 21:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: c3bc96a32530dd7781de8711eb1422b8 SHA-1: dbbb34a9fcd4be1aa2e732ba66b02211bdabbdbc SHA-256: a2bcc2315e87990889712377ceb44ca8f616bb6e3d9fcffa862fa9bf2c88c0dd

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though partially corrupted, contains a title that appears to be a lure, and the presence of multiple external URIs reinforces the attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
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://lozipotod.ru/strik?utm_term=better+than+ever+meaning+in+urdu PDF link annotation
- https://cdn.sqhk.co/bulunazi/I9hcggP/budotoni.pdfIn PDF document text
- http://tadidavazutopa.sportsontheweb.net/best_homemade_diet_for_dogs_with_ibd.pdfIn PDF document text
- http://vopugixeroramox.medianewsonline.com/el_amor_en_tiempos_de_colera_sinopsis_libro.pdfIn PDF document text
- http://lizoguxumugef.mywebcommunity.org/rojugidijikibujob.pdfIn PDF document text
- https://cdn.sqhk.co/durotula/gcggfhg/83645593402.pdfIn PDF document text
- https://cdn.sqhk.co/zavilisuga/bkvaA10/chuchela_kalan_to_amroha_train.pdfIn PDF document text
- https://cdn.sqhk.co/xusozapovu/ro0igiB/50369600323.pdfIn PDF document text
- https://cdn.sqhk.co/mubogasaven/bjcBNhg/free_music_download_sites_for_computer.pdfIn PDF document text
- https://cdn.sqhk.co/napumefu/dvhhAP1/first_aid_for_chemical_burns.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/dekogamik/rider_waite_tarot_guide.pdfIn PDF document text
- https://s3.amazonaws.com/fizup/saga_cazadora_de_hadas_3.pdfIn PDF document text
- https://s3.amazonaws.com/paropabaru/o_que__equoterapia.pdfIn PDF document text
- https://7ed1f289-57d1-4e2a-9ee4-b64e0eb498cf.filesusr.com/ugd/13dc0c_75fc6ce6197244a08afb338e75d1b262.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fedure/android_9_devices_in_india.pdfIn PDF document text
- https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_c723ab17ed9e4f359fedf7dc73a992fa.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/rodakarugupoko/80214254744.pdfIn PDF document text
- https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_0b8c9d4a19e54c0bba467e87f4cf1198.pdf?index=trueIn PDF document text
- https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_9307e2c8b5674686a0588d368c8647e6.pdf?index=trueIn PDF document text
- https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_30a20820f1544eaf994c53e1475f3297.pdf?index=trueIn PDF document text
- https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_06bd44fde3114c7399ea3bfe3c083119.pdf?index=trueIn PDF document text
- https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_05fbabcbe8234213a824f71cb7798608.pdf?index=trueIn 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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d4e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4E9	5136 bytes
SHA-256: `3a086a092937e562ba3b3f41ffa111c81695847e880631dc798b0ffeaf9923e1`
`font_01_sfnt_off0000e640.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE640	10580 bytes
SHA-256: `deba13fbcfb3a763955373cd97352e54acf87688bfe3df8a5c324b51c0bf25fd`
`font_02_sfnt_off00010a2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A2D	20800 bytes
SHA-256: `623272558cab01ffafa3db8ad6c9e13ccf0d56dde0304b9f84d68cb8d54f93d1`

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