Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a0d950792ceeaf…

MALICIOUS

PDF

78.4 KB Created: 2021-04-17 05:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d8ed20d0210b17c8dbbad1fa94d9d8db SHA-1: 29db5f0f312f991cd353fbb0bfd56a8e13556147 SHA-256: 78a0d950792ceeaf0268304f6d4b9335d5cc788d1d5759e1c70cd7747fa56df6
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=us+army+ranks+in+order+ww2 In PDF document text
    • http://gegezuwe.iblogger.org/spanish_to_english_dictionary_download.pdfIn PDF document text
    • http://wijotit.iblogger.org/warcraft_2_full_movie_in_hindi_download_720p_worldfree4u.pdfIn PDF document text
    • https://nakuzimatixibo.weebly.com/uploads/1/3/5/3/135388853/95023e.pdfIn PDF document text
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/8c2e0d.pdfIn PDF document text
    • https://suzotavuni.weebly.com/uploads/1/3/4/7/134765747/6294221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_0bcaea994d53462dbad23594a39eb34b.pdf?index=trueIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_5aa78a9d0bd64f9a935de1a778c10abb.pdf?index=trueIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_a9e4ff2369b649f2b8385ac1857dd6ac.pdf?index=trueIn PDF document text
    • http://vopimivukaf.epizy.com/create_google_form_from_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/new_odia_film_song_2019_free.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/mozart_alleluia_sheet_music.pdfIn PDF document text
    • https://bc3ee532-4344-4262-9f0b-d8353e2229a5.filesusr.com/ugd/6ca3f6_5b369b0d05a6429e949b6a0fd2e9e0a3.pdf?index=trueIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_900dd6dee3be484ba1f952c366135471.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/20041568955.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/70401417596.pdfIn PDF document text
    • http://bolapapuziku.epizy.com/84364336014.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/pegusexelixugufumakatad.pdfIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_87812128ec4e4de09105c755fd038060.pdf?index=trueIn PDF document text
    • https://a1b876fd-e98f-4594-996d-fc523792ae9e.filesusr.com/ugd/efcbf0_b1f619a773f646059d4a1981877a8419.pdf?index=trueIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_242d7cf5fde843e29199062b1a9f3297.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/asrock_n73v-_s_bios.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.

FilenameKindSourceSize
font_00_sfnt_off0000f251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF251 5320 bytes
SHA-256: 20cf5ebbaeb5fa3db9be35e3cc67c8d528013d604095184f59009ddf6121e040
font_01_sfnt_off00010471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 11260 bytes
SHA-256: 1abe71ec19e206624c78ea8fa41f886c8df5e04f6adf495209fd694d265b2cb3

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