Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5cb1401883e46b…

MALICIOUS

PDF

81.3 KB Created: 2021-06-13 03:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f700214fadf86b1625bd15a3e5250522 SHA-1: b43a6e38634f8da10562210dbb32fb127cd00e45 SHA-256: da5cb1401883e46bce56a0855bffc35d04d8a1fae5cde976e31330f80d4b2b14
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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.
  • 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://philabc.ru/pbw?utm_term=who+are+the+10+most+richest+people+in+the+world PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467004/normal_5fc648cd7901f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476782/normal_5ffff7e96c5f2.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/favavufisom.pdfIn PDF document text
    • https://rovividupezudu.weebly.com/uploads/1/3/4/3/134373795/448935d3f6a.pdfIn PDF document text
    • https://kififapowugix.weebly.com/uploads/1/3/4/6/134685489/37221272a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_5fd14cf94473d.pdfIn PDF document text
    • https://fipuzogafugigen.weebly.com/uploads/1/3/4/1/134108551/fijivuva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fcc809a222ca.pdfIn PDF document text
    • https://pakopigame.weebly.com/uploads/1/3/0/7/130738837/753945.pdfIn PDF document text
    • https://kagunalikabogow.weebly.com/uploads/1/3/5/3/135350350/1774963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xetibubib.pbworks.com/f/pokemon_light_platinum_gba_free_download_for_android.pdfIn PDF document text
    • http://zixereves.pbworks.com/f/how_to_start_maytag_quiet_series_300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5848776-5412-4e7c-9f3f-2daa0b706cf1/achyutam_keshavam_krishna_damodaram_lyrics_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7137fab-c6be-4868-ae61-e4433ce8aeb1/78606033618.pdfIn PDF document text
    • http://nefusim.pbworks.com/w/file/fetch/144815391/is_h_band_app_safe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b23886e7-cb14-485c-903e-b837a37d7929/cant_stop_wont_stop_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19f7bec-f295-405b-b908-a0f74e93cd0a/how_to_get_a_grant_to_buy_land.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b063e2-97e3-4b62-a48d-95145c16de6b/kujudegimobavexudaniz.pdfIn PDF document text
    • http://bulafiko.pbworks.com/f/big_muscle_bear_daddy.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_off0000fbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE6 5612 bytes
SHA-256: 8b73f1c6d6bdbfead8c29858bc2db2d1c60e1e523875842102d14c908e80f948
font_01_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 12292 bytes
SHA-256: 26a04c2edf5ae5ca51da2add41c70a9ef3fb2d9f0a64500046b1f22d24b5a5aa

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