Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbcb3e14cc191a5…

MALICIOUS

PDF

80.4 KB Created: 2021-04-01 17:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 52705c8bbebe2f9ce6ae74f873154e82 SHA-1: 3d34b54ef1f9c8da81fb23c7f51a684fe130656a SHA-256: ebbcb3e14cc191a502f67c14d1c150c806ab50a6d52f1f858e9e9021e590717d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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.
  • 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://lozipotod.ru/aws?utm_term=troy+bilt+5500+watt+generator+oil+type PDF link annotation
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/japuzitubi.pdfIn PDF document text
    • http://italywow.pro/mounam_pesiyadhe_movie_hd_720p_downloadvrrtr.pdfIn PDF document text
    • http://tumbaa.space/120737276hgsh.pdfIn PDF document text
    • http://bestita.space/sizizavimusivinedivuzhqj6j.pdfIn PDF document text
    • https://kovakaxidaxid.weebly.com/uploads/1/3/5/3/135322813/03783b949.pdfIn PDF document text
    • https://josuriwomevopi.weebly.com/uploads/1/3/4/7/134769094/wafokok.pdfIn PDF document text
    • https://kumapeforurimo.weebly.com/uploads/1/3/4/6/134664671/leludazaxulo_duvoj_zonik_wumew.pdfIn PDF document text
    • https://roguraluvi.weebly.com/uploads/1/3/0/7/130776180/5111239.pdfIn PDF document text
    • https://dovejopizodumu.weebly.com/uploads/1/3/4/8/134883147/fabovenazeze.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/36276580036688pe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_570d1d2841e14335b280a6cfa558611e.pdf?index=trueIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_416bd86d859a4b4bb5aa8e669db87f48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af2cf90-8935-4b4c-b653-10fa390e0a30/19922435834.pdfIn PDF document text
    • https://c538924d-9290-4e35-808b-5013ecaac822.filesusr.com/ugd/047ea9_e3b1df7675d84fd78278bbb840c15121.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_9fc476e48f6a4681b4014360297f8457.pdf?index=trueIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_75530b70e7024938a059e42a35072865.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89f8573-8d2c-4210-84df-f0693a759a88/excel_formula_if_cell_contains_number_then_add_another_cell.pdfIn PDF document text
    • https://7c50ec62-1ece-451b-b03c-4788199016cf.filesusr.com/ugd/635f3c_902b5cd9ca2b4f36af6272df6b94b2c2.pdf?index=trueIn PDF document text
    • https://4de1274e-a26b-4e71-a0d1-d86f0cfee7ee.filesusr.com/ugd/ee4d88_924891abfd8f49b989ad310f50961186.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_9b4e54fc39f64693ad968a2b3404ee4c.pdf?index=trueIn 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_off0000fabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABD 5360 bytes
SHA-256: 0139dad8ba9a0b1101fbb4b8b0bdb894ea7f13dc5bd753223408a009ab0f8eaa
font_01_sfnt_off00010d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D26 11364 bytes
SHA-256: a00e1b0373c8e05bf6301d6f747b3ab2cc1edc944f44be2560dd3796c4f7566a

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