Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a55a5d184979bd…

MALICIOUS

PDF

82.5 KB Created: 2021-05-02 19:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34f06904057fd7e1c44f54356df67eb4 SHA-1: b8ab648cbf4cd99175fcfbfc755bda7bb1a31062 SHA-256: 13a55a5d184979bd8f90a9426723daffa383cc7575f3603d30567ebdec36e343
96 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. It contains an embedded URL that leads to a phishing site, disguised as a search result. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, suggesting a potential phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://seumenha.ru/strik?utm_term=is+there+an+air+force+base+in+germany
    • https://mezovojexojija.weebly.com/uploads/1/3/0/8/130874002/zisevejonor_jebotibad_zenobep_kepunivetuwukib.pdf
    • https://cdn-cms.f-static.net/uploads/4472479/normal_602498c996f30.pdf
    • https://vujipobunovopo.weebly.com/uploads/1/3/5/3/135324227/89aa82d7b414.pdf
    • https://cdn-cms.f-static.net/uploads/4446651/normal_602be383d9322.pdf
    • http://tavaxibewoposo.iblogger.org/74287115977.pdf
    • http://lexanizisujufum.66ghz.com/a_plague_tale_innocence_pc_performance.pdf
    • https://static.s123-cdn-static.com/uploads/4454306/normal_5ffda1f674ddf.pdf
    • http://jezokinuka.22web.org/samsung_galaxy_note_3_price_in_bangladesh_2019.pdf
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/762be4e024f8c3.pdf
    • https://nobaloledajasom.weebly.com/uploads/1/3/2/6/132681012/058d26c29a60.pdf
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/fixepatej-pibojefukit-kupeneti.pdf
    • https://static.s123-cdn-static.com/uploads/4481163/normal_5ff40e27e6d23.pdf
    • https://cdn-cms.f-static.net/uploads/4472763/normal_6069312a87508.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d33fc366-e048-45ac-963f-9943a2e203a0/78820468142.pdf
    • https://uploads.strikinglycdn.com/files/6eba09e2-86d6-4094-9cc2-27049dc15571/74292678517.pdf
    • https://s3.amazonaws.com/ronenitevodo/47814663433.pdf
    • https://s3.amazonaws.com/sixenogafopoj/janidoxatofebaro.pdf
    • http://dovitunazimaze.epizy.com/76301806112.pdf
    • https://uploads.strikinglycdn.com/files/e377e113-36b9-40a8-8af5-5d50e0a3a808/check_battery_life_ba_ii_plus.pdf
    • http://nokonasaxe.epizy.com/navope.pdf
    • http://tesusaruva.epizy.com/angular_form_control_example.pdf
    • https://s3.amazonaws.com/farokof/96520138334.pdf
    • http://gunubaxerilol.epizy.com/45513455017.pdf
    • https://s3.amazonaws.com/dudurat/49002464588.pdf
    • https://uploads.strikinglycdn.com/files/d076aa4d-57c6-45d7-95e5-b559404b38a0/us_navy_seals_requirements.pdf
    • https://uploads.strikinglycdn.com/files/d6cbe893-8860-45f5-800f-ac5f82aea54e/making_content_comprehensible_for_english_learners_3rd_edition_isbn.pdf
    • http://zufagubiles.epizy.com/scert_up_books_free_download.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f9.bin
01eb72d31145d82021a0beaac76b16e5601cb568b0c98811ff0dc9062ab5518c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 5232 bytes
font_01_sfnt_off00010998.bin
049d5c6f7fea19041d344bcd5ab18850b4490a7aca1157ac8c7af0bc87e5d9eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10998 10640 bytes
font_02_sfnt_off00012dfc.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFC 4324 bytes

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