PDF malware analysis — malicious · 28a8fe890c53151c

MALICIOUS

PDF

85.0 KB Created: 2021-03-30 03:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: bdd56fd4576da8665c9e484d7f529c2b SHA-1: 597d85d22b749bef4f8dfa7e5e2de9b860b6f9e7 SHA-256: 28a8fe890c53151ca4058fcd92c057d394bf5ad6fdb9645d85e473d3590cdefe

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
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://golowaki.ru/award?keyword=waiting+for+godot+as+an+absurdist+play+pdf PDF link annotation
- http://filfex.ru/nadovapulopalisemu4lkk3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367952/normal_602b58b17cf92.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465249/normal_5fe0ba4ba0b72.pdfIn PDF document text
- http://amst-watch-v1.club/jury_duty_los_angeles_reporting_timee5gb6.pdfIn PDF document text
- http://circus.market/barbra_streisand_songs_freeyaahr.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419451/normal_6022242d804c4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369153/normal_60624dcc25431.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368770/normal_5fe105a8a0c6a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4425738/normal_5fcd3a33a045c.pdfIn PDF document text
- http://ndfnasg.xyz/65385873916tr3nk.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4455642/normal_5fcaa7abe9981.pdfIn PDF document text
- http://sexedate69.site/missing_word_quiz_answers2zrjx.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380226/normal_605523aba2566.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
- https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_303ec78937b14c91aa3aad8e709f9674.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/purixifusipelid/how_to_fix_dometic_e7_error_on_air_conditioner.pdfIn PDF document text
- https://s3.amazonaws.com/tokit/why_isnt_my_subs_working.pdfIn PDF document text
- https://s3.amazonaws.com/bagokiko/acceptance_and_commitment_therapy_for_psychosis.pdfIn PDF document text
- https://s3.amazonaws.com/gogunabones/anestesia_local_malamed_gratis.pdfIn PDF document text
- https://s3.amazonaws.com/luxelula/head_first_java_2nd_edition.pdfIn PDF document text
- https://s3.amazonaws.com/vabemavuputenif/wetulawivaje.pdfIn PDF document text
- https://s3.amazonaws.com/foneniz/libertango_sheet_music_sax_quartet.pdfIn PDF document text
- https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_1204a12f7f2141d199486acdf94c7275.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mesixadelomomo/pennsylvania_unified_judicial_docket_sheets.pdfIn PDF document text
- https://s3.amazonaws.com/dadupawo/avast_antivirus_free_cracked.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_off0000fd7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD7F	5228 bytes
SHA-256: `c54c163da18e5c4e655523deb14550a6bd593da930f4dbfbc5c27b09916bffcc`
`font_01_sfnt_off00010f54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F54	12228 bytes
SHA-256: `caa4e83e5210a692efd2eac4f43e21c06ded2ca28a51911c89d5c8804860b36b`
`font_02_sfnt_off00013685.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13685	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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