PDF malware analysis — malicious · dbd4425f549ae765

MALICIOUS

PDF

80.0 KB Created: 2021-05-02 15:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 73fb88b06fd728fd009da5dc100bf4cd SHA-1: e486655c4128ae3fb42a163b0591fbde0fee6057 SHA-256: dbd4425f549ae765208704e8fdf804588793840cc184d5c29f3a5afedcc8477c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to Weebly hosted PDFs, suggesting a link farm or redirection mechanism for phishing or malware delivery. The document body, though heavily obfuscated, contains strings related to product names and application versions, likely serving as a lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9967

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://seumenha.ru/strik?utm_term=presto+food+dehydrator+06303 PDF link annotation
- https://guvatezip.weebly.com/uploads/1/3/0/7/130776756/gobit.pdfIn PDF document text
- https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/nevivoti-lodifemotavup-kemojusesafel-kabijinudenu.pdfIn PDF document text
- https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/6401754.pdfIn PDF document text
- https://melitonewivowaw.weebly.com/uploads/1/3/1/3/131380875/remid-kesopupenitap-supiwudimaw-jivaxi.pdfIn PDF document text
- https://kilosite.weebly.com/uploads/1/3/0/7/130739696/4960563.pdfIn PDF document text
- https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/d73b3210ced1e8.pdfIn PDF document text
- https://nogisapu.weebly.com/uploads/1/3/1/4/131453993/4952938.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/mujesogi/wolunaginewuxe.pdfIn PDF document text
- http://lurosanonit.epizy.com/59027041991.pdfIn PDF document text
- https://s3.amazonaws.com/wexoteluwag/berenstain_bears_go_to_school.pdfIn PDF document text
- https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_7070877a7fc14c538fd27da245a1d601.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/tumuzu/fractions_revision_worksheet_gcse.pdfIn PDF document text
- https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_1cecf495e7144539ab20b29e407e7cb3.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/wibadinavosunom/show_battery_percentage_app_android.pdfIn PDF document text
- http://nemunuj.rf.gd/bolo_de_chocolate_nega_maluca_forma_grande.pdfIn PDF document text
- https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_dc86a988fe884baa9a4306f236c41dc1.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fulazelof/90228962601.pdfIn PDF document text
- https://s3.amazonaws.com/towakog/what_events_led_to_the_writing_and_signing_of_the_declaration_of_independence.pdfIn PDF document text
- https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_6028d1664d2b4bf0b58a54a44ce21a75.pdf?index=trueIn PDF document text
- http://xajizufobuvofo.epizy.com/still_alice_book_page_count.pdfIn PDF document text
- https://s3.amazonaws.com/didowugorokirug/zupabotexalexuwutuvim.pdfIn PDF document text
- https://s3.amazonaws.com/wejuvono/cd_layout_template_word.pdfIn PDF document text
- https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_5dc2e6d91aa94471ac834c2434c92e71.pdf?index=trueIn PDF document text
- http://fisazivibutaz.epizy.com/carrier_xpower_inverter_12000_manual.pdfIn PDF document text
- https://s3.amazonaws.com/baritexovopa/39939924420.pdfIn PDF document text
- http://nazifaba.rf.gd/vut_academic_calendar_2019.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_off0000fa5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA5F	5528 bytes
SHA-256: `cf258321b582861b7ab44525c19933f3ea813c17b9f4a9720acc0f23cd4c02dc`
`font_01_sfnt_off00010d29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D29	10852 bytes
SHA-256: `23ba626674036027a42129e09a742d4cc9ea1dab5c00f2e14e5e2ae76ece9d70`

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