Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d27ab7414c34c3…

MALICIOUS

PDF

79.8 KB Created: 2021-03-14 14:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 489f53e7aa242e9bb04db9315a2ddac4 SHA-1: 8416435666c5979fda0978823eac74bd4ff7c3bb SHA-256: 75d27ab7414c34c322fd9fc1e8bf358c6aa62e7c6c5ef92fc783775dcb8278db
186 Risk Score

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 0.9964

Heuristics 6

  • 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 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://dugedepap.ru/wix?keyword=geometry+composite+figures+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4484635/normal_6035c482d5b56.pdfIn PDF document text
    • http://libralab.digital/adobe_illustrator_course_freehs1r6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423780/normal_5fd10cb0572d5.pdfIn PDF document text
    • https://folenepawesig.weebly.com/uploads/1/3/2/6/132680852/7111a55408c.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/loctite_270_datasheet.pdfIn PDF document text
    • https://senevilamopon.weebly.com/uploads/1/3/0/8/130814687/1689479.pdfIn PDF document text
    • http://iglivesupportteam.com/fuel_up_to_win_2019_rare_stickersa2wt9.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/3238626.pdfIn PDF document text
    • http://kapusta.pro/tetemibarupozovexevokelepiejr0.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/2566511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_5fe87dd070e16.pdfIn PDF document text
    • http://specialsale.info/xuzutukafabe4a9w8.pdfIn PDF document text
    • https://nonoxatuvel.weebly.com/uploads/1/3/2/6/132681685/3424467.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/6640663.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/schwinn_570r_vs_270.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/xaxasebe_jojomidusefal_liludalo_wogisupezerava.pdfIn PDF document text
    • https://sunapibabe.weebly.com/uploads/1/3/3/9/133999858/jafakazifufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408702/normal_5ff3f9d9559c7.pdfIn PDF document text
    • https://nokemodikobo.weebly.com/uploads/1/3/4/3/134308311/15bd25.pdfIn PDF document text
    • https://tonewebebajuja.weebly.com/uploads/1/3/5/3/135319275/f25dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388611/normal_5fefeb3988732.pdfIn PDF document text
    • http://kelimap.mywebcommunity.org/vesutuxejenepajesaveseved.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14309c8-cd3c-4940-897f-a305759ab2c8/pixakiwudokojipukodelanun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63888cd9-8e6e-4d38-b3bb-ade08331ba6f/kenmore_washer_70_series_wont_spin_or_drain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5816f453-aa34-42bf-96f2-46cbbaa5d23c/denon_dht-s514_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ff644e-38f5-4d5c-9594-c29c9bea78db/what_to_expect_elective_caesarean_section.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/810795ca-fbda-437c-a806-218f80acec10/69887549308.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 5476 bytes
SHA-256: eee8a485796f7b621e6db463892cd048d6ec7acea30fec73efaeee36c5c868f6
font_01_sfnt_off00010862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10862 12144 bytes
SHA-256: 6c5c84c092af04084153c2427600c16fd29a41fcdd51869ecc40f8799d7e18e1