Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7aa9a2df7cc8712…

MALICIOUS

PDF

75.8 KB Created: 2021-03-11 07:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b01adc2d88eb07bdcf3a357e102fbdd1 SHA-1: d6f559364e1afc43d9cc894ef1e9f67173f807fc SHA-256: b7aa9a2df7cc8712ea4c20cc453a24336286708b57fd0a7ba6f49dec31a6000f
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized PDF files, suggesting a link farm or phishing operation. The primary URL, 'https://jottigo.ru/award?keyword=beats+studio+wireless+manual+pdf', is presented as a lure for a manual, indicating a phishing pretext. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/award?keyword=beats+studio+wireless+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488804/normal_6014abdf1cc51.pdfIn PDF document text
    • http://urro-hu.com/sazuxokunode6735p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462980/normal_5fcb3040792ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5ff5e88cab79c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_601c9a5289160.pdfIn PDF document text
    • http://sarhello.online/indigo_boarding_pass_onlinejhndv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_60478ee12ae88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_601e64d0074d7.pdfIn PDF document text
    • http://damvglaz0.xyz/69684254130o0l54.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/2005_john_deere_hpx_gator_specsf2ngb.pdfIn PDF document text
    • http://livecopyrightverification.com/fewagovokiwofadazul6t8wc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476416/normal_6019af1bdbc53.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_75116ce74e78432e9fca5e73752adbe7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/lolojujiledan.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/vyond_studio_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/pofejilunugifagejatasu.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/xojim.pdfIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_1a50a96771c04ed58d190cbb55f0775f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/why_is_my_frigidaire_water_dispenser_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/cartoon_network_tv_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/final_fantasy_7_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/zibekupepupaloliginexeso.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/mockingjay_pin_book_vs_movie.pdfIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_5fbc8844bbc94aa797af9de652377674.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_a2c5698ae91d4e27b34423f9fd35360f.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_56872b3ae8a54bb2956d804e13b20ad8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/hillman_distinctions_floating_house_number_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 6168 bytes
SHA-256: de6aacb5a55f55b98bf3ae384f96a51051c900e5a59c241f5198d539ce1a3af5
font_01_sfnt_off0000ed58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED58 5328 bytes
SHA-256: dbec05b94e82f4a0385978d8474132dc0da1c60aa2646e6f7f9a922a7fde3937
font_02_sfnt_off0000ff70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF70 9844 bytes
SHA-256: a53827214a6d30b0e086eeb54426f257d092e4c760e6decccc2acde5f047ef0f