Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5399583b8ef1c6d…

MALICIOUS

PDF

130.0 KB Created: 2021-03-22 10:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f4482184a64e007760de302adb590d1 SHA-1: 14028e4744eb9b58cafc65c676919bbbe557f746 SHA-256: b5399583b8ef1c6dffa18a614a19d2a5fd0be024b56510b84ef07e739c30b365
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and a high density of links within a small PDF, indicating a link farm or phishing lure. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://botokaw.ru/aws?utm_term=unravel+tokyo+ghoul+lyrics+meaning
    • http://miwuzobi.sportsontheweb.net/6406191445.pdf
    • http://kozoperog.iblogger.org/legodorol.pdf
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5fd8688d5de59.pdf
    • http://ferafukapawap.scienceontheweb.net/bodegebesika.pdf
    • http://lopitimew.mygamesonline.org/vumifuwa.pdf
    • http://zofapojofiwifi.iblogger.org/pomowagexafamoxewapofiniz.pdf
    • https://cdn-cms.f-static.net/uploads/4389085/normal_602f2b7d6ca07.pdf
    • http://malanefire.sportsontheweb.net/jirarupijurud.pdf
    • http://kogutojoveso.mywebcommunity.org/xonusaxenikelepiw.pdf
    • https://cdn-cms.f-static.net/uploads/4445106/normal_6020cbc0ef339.pdf
    • http://zulesaxeririv.sportsontheweb.net/xawutaxoduxuki.pdf
    • https://cdn-cms.f-static.net/uploads/4455639/normal_60267f7c98333.pdf
    • https://static.s123-cdn-static.com/uploads/4380082/normal_5fe491390fbe4.pdf
    • http://bewujasixi.mywebcommunity.org/tisev.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lazolu/arcane_trickster_guide_pathfinder.pdf
    • http://ribitotuv.epizy.com/accounts_receivable_management_policy_theory_and_evidence.pdf
    • http://gavawekib.myartsonline.com/asciidoctor_docker_image.pdf
    • https://s3.amazonaws.com/poguvelefa/18488692225.pdf
    • http://xepuzakudera.atwebpages.com/9765882444.pdf
    • http://roxewew.epizy.com/iifa_awards_2017_full_show_720p.pdf
    • http://xumugipetoje.epizy.com/gagamibozojofadi.pdf
    • https://s3.amazonaws.com/paropabaru/nelisaxinumipelon.pdf
    • https://s3.amazonaws.com/zedudo/calibri_font_mac_os_x.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00018f32.bin
6b396c5f0c1de741cdfaa550b5392abe711a01b3de10e2ca1463ebcccadee5d6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18F32 16852 bytes
font_00_sfnt_off00011276.bin
44040c06df1a96a1e6fe114cc6d02bf67d4046882fa6fb009f21d1f6479b5414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11276 30692 bytes
font_01_sfnt_off00017214.bin
064740a34d8b94495998c98221094578ce2fc7a09dac46cac4d15a3db23290d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17214 5428 bytes
font_02_sfnt_off0001846d.bin
5fadf55bec9a584e9a8ac4094839f070ccb1ace81c3c3762652ee8ee5e5ce8a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1846D 2500 bytes
font_04_sfnt_off0001bd4a.bin
bcadce4148bee3bac20024f9ef780439d7d98e0597e22d366e7b71a501858bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD4A 10968 bytes
font_05_sfnt_off0001e326.bin
fc032edf3f452d37699980565b6bb9812f1687357b53f767de8449b1b3b615be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E326 16268 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.