Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ef5e702ec2b4a1…

MALICIOUS

PDF

88.1 KB Created: 2021-04-01 18:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d807e9a89ae37cd34dcea268892e8441 SHA-1: 78a7c55488f0843b4a159134ca04ed4b750a43f5 SHA-256: 72ef5e702ec2b4a1fe9d80a923976c7727d4d5771088bcec4a8134c76d36d934
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('fokemale.ru') and another to a link farm ('cdn.sqhk.co'). The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, suggesting the PDF is used to distribute links to further malicious content. No scripts were extracted, but the presence of external URIs and the nature of the heuristics strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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://fokemale.ru/strik?utm_term=shipboard+oil+pollution+emergency+plan PDF link annotation
    • https://cdn.sqhk.co/viwukepato/CHvjfja/rawobevef.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/35219297795.pdfIn PDF document text
    • http://punalavivex.22web.org/how_to_install_nexus_mods_fallout_4_xbox_one.pdfIn PDF document text
    • https://buzoraxuv.weebly.com/uploads/1/3/4/3/134366179/7329a.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/jujurod.pdfIn PDF document text
    • https://bosowumajozidu.weebly.com/uploads/1/3/0/7/130740465/242e41.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/jhOHGhd/zombie_hunter_zombie_shooting_games_zombie_games.pdfIn PDF document text
    • https://cdn.sqhk.co/kerodamajop/bggjfhI/lexud.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/ija9gjW/senonojunimisixesaxobeka.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/gimoj.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/21592269262.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/morenel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/gulurulum.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/fugunubifuzizun.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/27149027393.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/my_family_and_other_animals_full_movie_2005.pdfIn PDF document text
    • http://wunikuwikefa.epizy.com/skunk_kings_boiled.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_441e4039c3fa4f52b75e2233bef4b393.pdf?index=trueIn PDF document text
    • http://widepidaba.atwebpages.com/icom_ic-v8000_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/consumer_reports_65_inch_tv_ratings.pdfIn PDF document text
    • http://fadirekobesi.rf.gd/89142662686.pdfIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_5c59637f4dc44ef1aee8b6c9f4f2024c.pdf?index=trueIn PDF document text
    • http://gurabagoderes.atwebpages.com/canon_80d_manual_espaol.pdfIn PDF document text
    • http://joduzot.rf.gd/7_day_carb_cycling_meal_plan.pdfIn PDF document text
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_9bf2bf30ce044104b84b98c0a2521b2c.pdf?index=trueIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_8535c5eb341a4ac09eec4f5732f9fa47.pdf?index=trueIn PDF document text
    • http://peworesafasar.epizy.com/89294632058.pdfIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_38ad56bd3b6245bd909c0963149cfc19.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_off00011a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A64 5652 bytes
SHA-256: 88cc20572895ac2afd66c63aba572764b1887761e816c588154cfe29135117f6
font_01_sfnt_off00012d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D72 10828 bytes
SHA-256: 92db2cdea5737dbfe16d141bdcd7acce257d2cbd80d094e6c0638bfc6d144916