PDF malware analysis — malicious · 1a7a782225169d39

MALICIOUS

PDF

77.9 KB Created: 2021-04-07 01:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: 7abd655bf9b719f390ef4b273984cba9 SHA-1: c50c37acc42437149baf541fe5ba6078ca4a8652 SHA-256: 1a7a782225169d39e4e6aed6853e5c1b6ac276c6773ee952297ce8ec639ef888

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous embedded URLs and a heuristic indicating a lure to enable macros or editing, suggesting a phishing or social engineering attack. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. The document body, though heavily obfuscated, contains text related to running macros, reinforcing the lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 6

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 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.
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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://pelibifir.ru/strik?utm_term=how+to+run+macros+in+excel+2013 PDF link annotation
- https://cdn.sqhk.co/xokipuxat/iehgvja/47566647824.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4466664/normal_5fdfb8172daae.pdfIn PDF document text
- https://cdn.sqhk.co/zepipawetopi/dYFaPOJ/vexedafag.pdfIn PDF document text
- https://cdn.sqhk.co/zarifabidit/cibmljf/.pdfIn PDF document text
- http://pazolozul.mypressonline.com/how_to_change_into_word_doc_on_mac.pdfIn PDF document text
- http://tagaporigowekis.mygamesonline.org/fevuwekowajawujip.pdfIn PDF document text
- http://kukuginori.22web.org/rewulotibetobek.pdfIn PDF document text
- https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.pdfIn PDF document text
- https://cdn.sqhk.co/sebixodof/jigyW01/jekeketepama.pdfIn PDF document text
- https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4497369/normal_5fcccbe1681c6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465938/normal_6023db2c4a44b.pdfIn PDF document text
- http://bulubuzigajuzar.getenjoyment.net/planejamento_educacional_para_aprendizagem_significativa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481819/normal_6024f78039edd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427499/normal_60484fe8effee.pdfIn PDF document text
- https://cdn.sqhk.co/fotenulutis/jbECUgh/curso_de_negocios.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/xubifupi/adding_and_subtracting_integers_word_problems_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/zubuwujoxom/mechanic_shop_business_plan_example.pdfIn PDF document text
- https://s3.amazonaws.com/sevoga/daring_act_meaning_in_english.pdfIn PDF document text
- http://roxoretubobo.rf.gd/40794109450.pdfIn PDF document text
- https://s3.amazonaws.com/vokeri/3800438523.pdfIn PDF document text
- http://lejiletuvasipib.onlinewebshop.net/what_is_a_liquid_ring_vacuum_pump_used_for.pdfIn PDF document text
- https://s3.amazonaws.com/xuvamuba/solutions_for_global_warming.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_off0000e86b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE86B	5556 bytes
SHA-256: `d5d00cc039375b2cfde5b575f474817942e858649531dd54cb77afd68e8324fc`
`font_01_sfnt_off0000fb42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB42	1800 bytes
SHA-256: `daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e`
`font_02_sfnt_off000103d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103D0	11116 bytes
SHA-256: `f60f2d6f4058ebb7298ddaffc7ceaf7dfd02239529166de77cd147b98ffd5eea`

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