Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8cd2605cc05a0a…

MALICIOUS

PDF

98.0 KB Created: 2021-05-20 22:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db92c9b9c24f257f64203a68c497f16a SHA-1: b7b2686ba87ad85e3159898aecf3d524567fc6d5 SHA-256: 0f8cd2605cc05a0ade23501b042098acbbd88ee0673e230e4d4856224a5a8e2b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, presented under the guise of 'Minecraft pe shaders download'. The primary URL, https://maypoin.ru/strik?utm_term=minecraft+pe+shaders+download+1.16.201, is likely the intended destination for malware delivery or phishing. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a link farm used for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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 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://maypoin.ru/strik?utm_term=minecraft+pe+shaders+download+1.16.201
    • https://cdn-cms.f-static.net/uploads/4443610/normal_605c4ff0ced7b.pdf
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/riferumifevifi_pataxumalesuvap_gadej.pdf
    • https://sofamilases.weebly.com/uploads/1/3/5/4/135401016/lovixasine_jigawetulomito_jatikizexonoxen_doveladupikawuw.pdf
    • https://static.s123-cdn-static.com/uploads/4418001/normal_5fe21d934b4ac.pdf
    • https://lawoxotat.weebly.com/uploads/1/3/4/5/134587222/b1df7ce.pdf
    • https://fogojokiverowur.weebly.com/uploads/1/3/0/9/130969702/7561949.pdf
    • https://negozikazaseju.weebly.com/uploads/1/3/4/5/134587396/xukorawuvo.pdf
    • https://kapefamutom.weebly.com/uploads/1/3/4/8/134849172/6197045.pdf
    • https://ruxamaref.weebly.com/uploads/1/3/4/7/134749336/8114400.pdf
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/7679802.pdf
    • https://cdn-cms.f-static.net/uploads/4450517/normal_604f8f325ea26.pdf
    • https://radugolun.weebly.com/uploads/1/3/4/3/134367443/c2a64d49.pdf
    • https://jonusozulat.weebly.com/uploads/1/3/4/5/134523624/sobesegazamo_fegozubupuzi_kebuw_vonuzewokajat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jupoti/as_related_to_memory_which_term_does_not_belong_with_the_others.pdf
    • https://uploads.strikinglycdn.com/files/3f31e141-6238-49db-8bd5-87e353e211d3/wimuneganevanalopevimukuz.pdf
    • https://uploads.strikinglycdn.com/files/0486c6c1-3ca7-40d4-97b2-82c158571b03/add_javascript_to_wix_page.pdf
    • https://s3.amazonaws.com/tojazudibumogab/yo_amo_san_pedro_de_la_cueva_videos.pdf
    • https://uploads.strikinglycdn.com/files/23012b31-8a5c-480c-a17e-0646ad121e88/37892953131.pdf
    • https://s3.amazonaws.com/webipejonavuv/2795545601.pdf
    • https://s3.amazonaws.com/numunenoji/formas_bidimensionales_planas.pdf
    • https://s3.amazonaws.com/dofufiri/sipotuxezas.pdf
    • https://uploads.strikinglycdn.com/files/583b81aa-08eb-48dc-8a87-60167e51a048/19578903136.pdf
    • https://uploads.strikinglycdn.com/files/618c5021-51e4-4177-8f0c-c18c55901f42/is_roku_premiere_good.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c8f.bin
2c4e814bd3638907529bb05e825816df0fc61ffe277f764f42aa5e4eedf55e82
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 5640 bytes
font_01_sfnt_off00011fc6.bin
92d85b8c547db77e56e1685db354728ecc7939fd920a668c1ce785324fb9c480
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC6 3212 bytes
font_02_sfnt_off00012ccd.bin
156de88937197ac7d0ad63ba1f3b7020698ce9acab3e7c02a6bd1c1fd7ccb621
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCD 12276 bytes
font_03_sfnt_off00015579.bin
92ca5277a07040a1118e6ffe557fff1b4332eaf15e577e4df2dfa25513d903e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x15579 16336 bytes
font_04_sfnt_off00016afc.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x16AFC 4324 bytes