Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8164f1ce2ede33…

MALICIOUS

PDF

79.0 KB Created: 2021-03-20 03:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 578687cc1bb27561e843675e454f6a80 SHA-1: ab813715ece9bd6742463918435aa2bcd9726c62 SHA-256: 8d8164f1ce2ede33ff333a8be2256066c404ada7344b537a9627503dcdb6dd7a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that leads to a domain associated with malicious activity, disguised with a seemingly innocuous title about pimple removal. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+get+rid+of+pimples+under+skin+fast
    • http://fivibimotuwar.22web.org/love_story_album_art.pdf
    • https://static.s123-cdn-static.com/uploads/4447466/normal_5feb1f3e6eb0f.pdf
    • http://befigter.xyz/baptism_of_fire_kingdom_come_loot46odu.pdf
    • https://static.s123-cdn-static.com/uploads/4483337/normal_5ffc572a5cd7e.pdf
    • http://lareluso.iblogger.org/mulafafefuvuxiluzovegikib.pdf
    • https://cdn-cms.f-static.net/uploads/4413865/normal_600c3b50e6721.pdf
    • https://static.s123-cdn-static.com/uploads/4417128/normal_5fe0d10b30e16.pdf
    • http://nadahul.ru/best_fantasy_books_for_young_adults_2020syo5s.pdf
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fdd5fdc60cd9.pdf
    • https://cdn-cms.f-static.net/uploads/4414166/normal_600c67eb88077.pdf
    • https://cdn-cms.f-static.net/uploads/4393193/normal_6026ed074f64d.pdf
    • https://static.s123-cdn-static.com/uploads/4464863/normal_5ff81c143bac6.pdf
    • https://static.s123-cdn-static.com/uploads/4469353/normal_5ff8bb7b6d95b.pdf
    • http://blog-uniswap.org/gamuvupegotevij47hwm.pdf
    • http://sdfsdfsdf.shaketorch.com/82800525542.pdf
    • http://pafunote.iblogger.org/daemon_prince_of_nurgle_datasheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_dcd082eddcdd42979e525052f24fab5b.pdf?index=true
    • https://ebed6276-6372-4ddf-adad-9a0fa504b99f.filesusr.com/ugd/805d2a_8649e57d3a8e4b13ad54fed68fe95c1e.pdf?index=true
    • http://rowebilit.epizy.com/lavijuzelomubifapupapopuv.pdf
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_5f65b56ab2fc4606a75ef0263f193109.pdf?index=true
    • http://mamisiz.rf.gd/appvalley_ios_10._3._3.pdf
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_a60eba3bcdfc4f21acdc3f99ecd00391.pdf?index=true
    • http://tuzotulerijenej.rf.gd/fisioterapia_na_hernia_de_disco_lombar.pdf
    • http://zojimako.rf.gd/die_casting_nptel.pdf
    • http://mupufuten.epizy.com/the_case_for_a_creator_book.pdf
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_9f15dcbe2430434986bde18443f040e0.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f34d.bin
39d112f266e98c3eb20acb8805c6e5495a5e29ae5941048edc7791583be5958f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 5476 bytes
font_01_sfnt_off000105ee.bin
75aa2fff15cc144ed3562d82b7ee6b8f03cd093bf1347459f8933c73b9f3dc34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 11984 bytes

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